Mac Air Storage Full

Nov 16, 2020 • Filed to: Solve Mac Problems • Proven solutions

• Mac Air Storage Full
• Mac Storage Space
• System Storage Mac
• Mac Air Storage Full

The capacity to multitask is one of the advantages computers have had over you and me. That and their speed in execution of tasks. With brands such as Mac, they can completely revolutionize your lifestyle in every aspect. From work to leisure, computers have been seen to make a difference.

However, technology should not be fully trusted. Systems fail, and the Mac is no exception. One sign of failure is when your system runs out of application memory and you have to make more free space. But why? Well, when you have a tone of apps installed with many of them running simultaneously, your Mac is likely to get worked up.

• Another method to sort the issue is to install extra memory. However, you should do your homework first to find out if your Mac model supports RAM upgrades or not. Here's a quick tip: if you own a MacBook Air, it's a no-go. Some MacBook Pro laptops can be upgraded, but this only holds true for mid-2012 models and earlier.
• The virtual memory works as RAM if the application memory gets overwhelmed. When full, there is no room for expansion, and thus your Mac runs out of application memory. Also, applications can crash as a result of your Mac running out of application memory.

My Mac Huge System Storage – Feb 2018. As well known, the Mac operating system usually takes up from 8GB to 13GB.So I don't think my Mac 'System' storage could be that huge, so I searched to find how it defines 'System' storage for a Mac, and how to free up that storage.

When you are done reading the article, you'll have great insight into what happens to your MacBook's memory. Here we go!

Part 1. What is Mac Application Memory

Mac Application Memory is the part of your system that is designed to handle running applications. Usually, when you download and install a software, it gets placed on your internal Hard Drive. It is what is commonly called the disk space. It is also where you keep your other files for storage.

However, a time comes when you need to launch the application. When it's up and running, all its operations take place in the RAM (Random Access Memory), also known as the application memory in Mac.

So, how do these applications work with the application Memory?

When an application is running, its files with code (in various languages), are constantly availed to your CPU for processing. That is why it is termed as ‘random.'

Therefore, when your RAM is working optimally, there are no delays. Applications launch faster, and games play seamlessly without constant freezing. Yes, freezing. If you are a gamer, you must have at one point witnessed this.

Also, the application memory works hand in hand with your CPU. As mentioned above, the CPU does all the logical processing, but if slow, you can't feel the power of your application memory. Your system will still seem slow even though you may not have run out of application memory.

But what does it mean to ‘run out of application memory'? Is it just because of the many apps you have open or is there more to it?

You will get all the answers in the next part.

Part 2. What 'Mac Run Out of Application Memory' Means

what happens when it runs out? Well, just like we get frustrated and confused when we think about too many issues or try to solve multiple problems with our minds, so does the Mac system.

Some of the causes include:

1. Excess multitasking of the system: Your Mac application memory can run out because of excess multitasking imposed on it beyond its capacity. In today's technological advancements, it doesn't take heavy apps such as Adobe premiere or graphically intense games to clog your application memory. Even browsers can tremendously impact your RAM.
2. The current demanding browsers: Take a look at the Chrome browser. How does it work? Every free browser is equivalent to a running process in the application memory. Thus, multiple open browsers behave or are like separate apps.
3. Running other apps: Furthermore, we all work on our Macs while listening to music in the background. So, when you put all this together, you realize that your system loads page slower even though you have high-speed internet. And it gets worse.
4. Browser enhancements: Websites now have ads and pop-up videos. Since you also need a seamless browsing experience, you install extensions on your browsers and allow plugins flash and scripts from websites. You also want instant access to your work, so applications once opened are left running in the background.
5. A full Hard Drive: As if all this is not enough, more and more content gets downloaded until your hard drive gets full. But what does that have to do with the application memory running out? Well, while running, your Mac OS regularly makes use of a ‘virtual memory' created on your hard drive. The virtual memory works as RAM if the application memory gets overwhelmed. When full, there is no room for expansion, and thus your Mac runs out of application memory.

Also, applications can crash as a result of your Mac running out of application memory. It is because the CPU can no longer access their files. It can be dangerous for you if you are doing sensitive work as your progress can easily get lost. In extreme cases, your Mac OS can malfunction.

When it comes to turning on the camera on your Mac, there is no on and off switch. Neither is there a software dedicated to operating the camera.

Therefore, how can you check on your application memory?

Part 3. How to Check the Application Memory on Mac

You need to continually keep tabs on your Mac application memory to keep it from running out. It ensures you don't launch unnecessary apps. Also, it prevents you from downloading and installing more apps that you may not need.

Thus, checking your application memory goes hand in hand with monitoring of disk usage. As explained in the previous part, it is also a culprit in leading to your Mac running out of application memory.

So, how do you check your application memory on Mac?

1. Go to the Apple logo at the top left and click on it.
2. Select ‘About This Mac.'
3. On the window that opens, go to the ‘Overview' tab. Here various details of your Mac are shown, including Memory usage.
4. For more information, click on the ‘System Report' button.
5. Under hardware, find the Memory tab. On the right pane, you will see the slot details.

You can also make use of the Activity monitor that shows real-time memory usage. It is also considered as Apple's Task manager. Its location is in the /Applications/Utilities/folder.

To launch it using the Spotlight search field:

1. Simultaneously press Command + Spacebar.
2. On the search window type ‘Activity Monitor.'
3. Select it when it comes up to launch the app.

Os x el capitan dmg. You can also use another way if your spotlight doesn't work.

1. Go to the finder icon on the application dock. It is the icon with two different face colors.
2. On the windows, select Applications from the side menu.
3. In the applications, open the Utilities folder.
4. Double click the ‘Activity Monitor' to launch it.

For continuous monitoring, you can keep the Activity monitor pinned on your applications dock. That way, accessing it is made easy.

Part 4. Solve 'Your System Has Run out of Application Memory'

You have seen how, for various reasons, your system can efficiently run out of memory and wreak havoc on your Mac. Symptoms of your Mac running out of memory include apps taking long to launch and files taking longer to open.

Now you can check out how to solve the error ‘your system has run out of memory' by making use of the following solutions:

1. Using an activity monitor.

Launch the Activity monitor as illustrated above and even pin it as explained to keep you up to date with what is happening on your system. From the Activity Monitor, you can check on quite many parameters of your system's operations, including CPU usage, memory usage, disk, amongst others, as shown in the image below.

2. Uninstall irrelevant applications.

You can do so manually through the applications folder:

1. Open the applications folder through the Finder icon.
2. Find the icon of the program to uninstall and right-click on it.
3. On the drop-down menu, select Move to Trash.
4. Empty your Trash.

3. Create space on your Hard Drive

To create space on your Hard drive means some of your files need deletion which can be either by deleting or backing up to your computer or an external Hard Disk.

To check on your storage:

1. On the Apple icon, select About this Mac.
2. On the window that opens, click on the storage tab.

A bar showing usage of your internal drive appears. You can then begin deleting files.

4. Remove unnecessary browser extensions

Whether on Chrome or Safari, find their extensions menu and remove unnecessary ones. These extensions contribute significantly to your Mac memory running out as they mostly work in the background.

5. Open fewer windows.

Whatever it is you are working on, ensure your screen is clear of windows you don't check on. Closing unnecessary apps speed up your system. For apps such as browsers, sites can easily be bookmarked so as not to lose them. Other applications can have their work saved.

Part 5. Use Recoverit to Recover Disk Data

During the process of clearing your system, it is possible to accidentally delete applications that were otherwise useful but mostly worked in the background, e.g., screen brightness controllers. You can also end up deleting system files amongst other essential data in your system.

In such a situation, how do you get back the files, mainly when you already emptied the Trashcan? Bluestacks crashing mac.

Well, there's a savior! It is called Recoverit Data Recovery Mac with the capacity to safely recover deleted files of all formats.

You must realize that you are the keeper of your Mac computer. Despite the usage, it is your responsibility to ensure it doesn't encounter issues such as running out of memory.

The monitoring of your Mac system is a day to day activity. Checking the disk usage and memory consumption should keep you informed of its status.

Employing techniques of frequently freeing up space on your Hard Disk can go a long way in saving you time when applications run. Where the memory has been deficient, and you also need all the apps, you can upgrade.

So, the help you have found from this article, don't forget to share it widely with the rest of the world around you.

A full startup disk is something that every Mac user will experience. This problem used to be known as 'Startup disk full' notification. However, on newer macOS versions this message has been changed to 'Your disk is almost full.'

But luckily, it's a problem that has many solutions. And in this article, we'll go over:

• What is startup disk full?
• What's causing 'Your disk is almost full' alert?
• How to fix startup disk full?
• How to prevent 'Your disk is almost full' problem?

However, we also understand that some people are short on time and just want to fix startup disk full. So, if you're not really interested in what it is and why it happens, just skip the next two sections and head to 'How to Clean Your Startup Disk'.

Or, even better, if you're looking how to clear space on Mac, we'd highly recommend a utility called CleanMyMac X. It'll help you clean up gigabytes of disk space in just minutes (you can download it here).

Note: if you're running macOS Sierra (or higher), it has a built-in option of Optimized Storage that is supposed to solve the problem of the full hard drive by moving files into the cloud.

By clicking 'Manage' you can open the menu and see what Optimized storage offers. However, it moves junk and useless files to the cloud together with your files, and eventually, you end up paying for iCloud storage to store junk. So we still recommend getting CleanMyMac and actually dealing with extra files rather than simply moving them.

Now, with all that said, let's get into what exactly 'Your disk is almost full' means.

Understanding What 'Your Disk is Almost Full' Means

What is a startup disk?

A startup disk, as taken from Apple Support article, is a volume or partition of a drive that contains a usable operating system. Still confused? Let's break it down for you.

Your Mac hard drive consists of disks (or partitions). Each disk (or partition) has your Mac data on it, which consists of your operating system, applications, etc. Most Mac users have just one disk but power users may have two or more.

When an application is running, its files with code (in various languages), are constantly availed to your CPU for processing. That is why it is termed as ‘random.'

Therefore, when your RAM is working optimally, there are no delays. Applications launch faster, and games play seamlessly without constant freezing. Yes, freezing. If you are a gamer, you must have at one point witnessed this.

Also, the application memory works hand in hand with your CPU. As mentioned above, the CPU does all the logical processing, but if slow, you can't feel the power of your application memory. Your system will still seem slow even though you may not have run out of application memory.

But what does it mean to ‘run out of application memory'? Is it just because of the many apps you have open or is there more to it?

You will get all the answers in the next part.

Part 2. What 'Mac Run Out of Application Memory' Means

what happens when it runs out? Well, just like we get frustrated and confused when we think about too many issues or try to solve multiple problems with our minds, so does the Mac system.

Some of the causes include:

1. Excess multitasking of the system: Your Mac application memory can run out because of excess multitasking imposed on it beyond its capacity. In today's technological advancements, it doesn't take heavy apps such as Adobe premiere or graphically intense games to clog your application memory. Even browsers can tremendously impact your RAM.
2. The current demanding browsers: Take a look at the Chrome browser. How does it work? Every free browser is equivalent to a running process in the application memory. Thus, multiple open browsers behave or are like separate apps.
3. Running other apps: Furthermore, we all work on our Macs while listening to music in the background. So, when you put all this together, you realize that your system loads page slower even though you have high-speed internet. And it gets worse.
4. Browser enhancements: Websites now have ads and pop-up videos. Since you also need a seamless browsing experience, you install extensions on your browsers and allow plugins flash and scripts from websites. You also want instant access to your work, so applications once opened are left running in the background.
5. A full Hard Drive: As if all this is not enough, more and more content gets downloaded until your hard drive gets full. But what does that have to do with the application memory running out? Well, while running, your Mac OS regularly makes use of a ‘virtual memory' created on your hard drive. The virtual memory works as RAM if the application memory gets overwhelmed. When full, there is no room for expansion, and thus your Mac runs out of application memory.

Also, applications can crash as a result of your Mac running out of application memory. It is because the CPU can no longer access their files. It can be dangerous for you if you are doing sensitive work as your progress can easily get lost. In extreme cases, your Mac OS can malfunction.

When it comes to turning on the camera on your Mac, there is no on and off switch. Neither is there a software dedicated to operating the camera.

Therefore, how can you check on your application memory?

Part 3. How to Check the Application Memory on Mac

You need to continually keep tabs on your Mac application memory to keep it from running out. It ensures you don't launch unnecessary apps. Also, it prevents you from downloading and installing more apps that you may not need.

Thus, checking your application memory goes hand in hand with monitoring of disk usage. As explained in the previous part, it is also a culprit in leading to your Mac running out of application memory.

So, how do you check your application memory on Mac?

1. Go to the Apple logo at the top left and click on it.
2. Select ‘About This Mac.'
3. On the window that opens, go to the ‘Overview' tab. Here various details of your Mac are shown, including Memory usage.
4. For more information, click on the ‘System Report' button.
5. Under hardware, find the Memory tab. On the right pane, you will see the slot details.

You can also make use of the Activity monitor that shows real-time memory usage. It is also considered as Apple's Task manager. Its location is in the /Applications/Utilities/folder.

To launch it using the Spotlight search field:

1. Simultaneously press Command + Spacebar.
2. On the search window type ‘Activity Monitor.'
3. Select it when it comes up to launch the app.

Os x el capitan dmg. You can also use another way if your spotlight doesn't work.

1. Go to the finder icon on the application dock. It is the icon with two different face colors.
2. On the windows, select Applications from the side menu.
3. In the applications, open the Utilities folder.
4. Double click the ‘Activity Monitor' to launch it.

For continuous monitoring, you can keep the Activity monitor pinned on your applications dock. That way, accessing it is made easy.

Part 4. Solve 'Your System Has Run out of Application Memory'

You have seen how, for various reasons, your system can efficiently run out of memory and wreak havoc on your Mac. Symptoms of your Mac running out of memory include apps taking long to launch and files taking longer to open.

Now you can check out how to solve the error ‘your system has run out of memory' by making use of the following solutions:

1. Using an activity monitor.

Launch the Activity monitor as illustrated above and even pin it as explained to keep you up to date with what is happening on your system. From the Activity Monitor, you can check on quite many parameters of your system's operations, including CPU usage, memory usage, disk, amongst others, as shown in the image below.

2. Uninstall irrelevant applications.

You can do so manually through the applications folder:

1. Open the applications folder through the Finder icon.
2. Find the icon of the program to uninstall and right-click on it.
3. On the drop-down menu, select Move to Trash.
4. Empty your Trash.

3. Create space on your Hard Drive

To create space on your Hard drive means some of your files need deletion which can be either by deleting or backing up to your computer or an external Hard Disk.

To check on your storage:

1. On the Apple icon, select About this Mac.
2. On the window that opens, click on the storage tab.

A bar showing usage of your internal drive appears. You can then begin deleting files.

4. Remove unnecessary browser extensions

Whether on Chrome or Safari, find their extensions menu and remove unnecessary ones. These extensions contribute significantly to your Mac memory running out as they mostly work in the background.

5. Open fewer windows.

Whatever it is you are working on, ensure your screen is clear of windows you don't check on. Closing unnecessary apps speed up your system. For apps such as browsers, sites can easily be bookmarked so as not to lose them. Other applications can have their work saved.

Part 5. Use Recoverit to Recover Disk Data

During the process of clearing your system, it is possible to accidentally delete applications that were otherwise useful but mostly worked in the background, e.g., screen brightness controllers. You can also end up deleting system files amongst other essential data in your system.

In such a situation, how do you get back the files, mainly when you already emptied the Trashcan? Bluestacks crashing mac.

Well, there's a savior! It is called Recoverit Data Recovery Mac with the capacity to safely recover deleted files of all formats.

You must realize that you are the keeper of your Mac computer. Despite the usage, it is your responsibility to ensure it doesn't encounter issues such as running out of memory.

The monitoring of your Mac system is a day to day activity. Checking the disk usage and memory consumption should keep you informed of its status.

Employing techniques of frequently freeing up space on your Hard Disk can go a long way in saving you time when applications run. Where the memory has been deficient, and you also need all the apps, you can upgrade.

So, the help you have found from this article, don't forget to share it widely with the rest of the world around you.

A full startup disk is something that every Mac user will experience. This problem used to be known as 'Startup disk full' notification. However, on newer macOS versions this message has been changed to 'Your disk is almost full.'

But luckily, it's a problem that has many solutions. And in this article, we'll go over:

• What is startup disk full?
• What's causing 'Your disk is almost full' alert?
• How to fix startup disk full?
• How to prevent 'Your disk is almost full' problem?

However, we also understand that some people are short on time and just want to fix startup disk full. So, if you're not really interested in what it is and why it happens, just skip the next two sections and head to 'How to Clean Your Startup Disk'.

Or, even better, if you're looking how to clear space on Mac, we'd highly recommend a utility called CleanMyMac X. It'll help you clean up gigabytes of disk space in just minutes (you can download it here).

Note: if you're running macOS Sierra (or higher), it has a built-in option of Optimized Storage that is supposed to solve the problem of the full hard drive by moving files into the cloud.

By clicking 'Manage' you can open the menu and see what Optimized storage offers. However, it moves junk and useless files to the cloud together with your files, and eventually, you end up paying for iCloud storage to store junk. So we still recommend getting CleanMyMac and actually dealing with extra files rather than simply moving them.

Now, with all that said, let's get into what exactly 'Your disk is almost full' means.

Understanding What 'Your Disk is Almost Full' Means

What is a startup disk?

A startup disk, as taken from Apple Support article, is a volume or partition of a drive that contains a usable operating system. Still confused? Let's break it down for you.

Your Mac hard drive consists of disks (or partitions). Each disk (or partition) has your Mac data on it, which consists of your operating system, applications, etc. Most Mac users have just one disk but power users may have two or more.

Let's look at an example of a Mac with only one hard disk:

• Your Mac's hard drive is 500GB.
• It has one 'disk' on it, so all 500GB of storage is on that disk.
• The disk has an operating system (OS X El Capitan), and user data (apps, etc).
• And since you only have one disk, this is your startup disk: all 500GB.

A Mac with two disks will have the storage divided between them. The Mac drive with the OS on it is the startup disk while the other drive is just used for storage of files. It's possible to have multiple startup disks, but most Macs will only have one. Silkypix jpeg photography 9 2 14 0.

Why your disk is almost full?

This is easy. It's a lot like why is your fridge full? There is no more space! Your disk is almost full and this is very bad news for any drive. A hard disk should never get beyond 85% capacity (especially a startup disk) as you will experience slowness and errors the further you get above that mark.

If your startup disk is full and you get a message of warning from your Mac, this is a serious indication that you need to clear up storage immediately.

What to do when your disk is almost full?

So how do you fix your almost full startup disk? The same way you solve the problem of a packed fridge - you need to clear up storage, of course. To make more space on your startup disk you will need to:

1. Delete files from your Mac.
2. Move files to an external hard drive or cloud storage.
3. Or install a second internal hard drive on your Mac.

So, now that we know what a startup disk is, we need to talk about how to fix it. Let's take a closer look at your disk space to see exactly what is causing your disk to be almost full.

What's Causing 'Your Disk Is Almost Full' Alert?

Short version: Take a look under-the-hood of your Mac.

Before we can see what is taking up space on your startup disk, first we have to find it:

1. Hover on the Dock at the bottom of your screen and open Finder.
2. Click on 'Finder' in the menu bar at the top of your screen.
3. Then select 'Preferences…'
4. In the window that opens, checkmark the 'Hard disks' checkbox.

After selecting this box, your desktop should now show the hard disks on your mac, in the form of icon(s), like this:

These are disks on your Mac that you can 'startup', this is because they have operating systems on them. If there is more than one of these hard disk icons that show up on your desktop, it means you've got multiple hard disks on your Mac. If you only have one, skip the down to 'What is taking up all of my startup disk space?' section.

If you have more than one, continue with the next step:

Click on the Apple icon at the top left of your screen System Preferences > Startup Disk.
Here, again, you'll find your hard disk(s); they're probably named something like MainSSD or MainHD. It will also display 'OS' and the version number of that OS. If you have more than one OS drive, your startup disk should be the one with the latest version of macOS running on it, but we're going to make sure of that in the next step.

I only have one and it looks like this:

To make 100% sure that you know what drive is your startup disk, follow these steps:

1. Click on the Apple Icon in the menu at the top-left of your screen.
2. Select 'About This Mac.'
3. Under macOS, you'll find a version number. Mine is 10.15.1, like so:

See how my version number in the 'About This Mac' window matches the number in my Startup Disk section? Yep — That's my startup disk. Found yours? Good.

What is taking up all of my startup disk space?

Now that we've identified our startup disk, let's take a closer look at how to clear up space on Mac:

1. Click the Apple Icon in the menu at the top-left corner of your screen.
2. Choose 'About This Mac.'
3. Click Storage.
   Note: If you are running an older version of OS X you may have to first click 'More Info…' and then 'Storage'.

Take a look at my hard drive disk:

I've got 500GB of storage, and about 275GB of it is free.

So, how big is your hard disk? How much free space do you have (if any — *gulp*)? And what's taking up the most space? It is important to consider drive capacity and data storage needs for future storage plans — we're not just here to fix the problem, for now, we're going to make sure you never have this problem in the future as well.

Now that we have the knowledge, it's time to take action and fix your Mac's 'Startup Disk Full' problem.

Let's go over 11 things you can do to help fix 'your disk is almost full.' These should also give you other ideas as to how else to fix it — You know your Mac better than we do!

1. Clear system storage on Mac

System storage cleanup sounds like a serious undertaking. But, technically, it boils down to just one thing: having the courage to scrap the old files.

1. Search for large ZIP/RAR archives in Downloads
2. Open your Desktop (Command + F3) and delete screenshots
3. In Applications, sort your apps by size. Delete the largest ones
4. Get rid of system junk files with a free version of CleanMyMac X
5. Restart your Mac to free up RAM.

2. Clean up cache files on your Mac

Cache files are files that help your Mac run programs a bit more smoothly. Think of them like blueprints for a house: your Mac has the blueprints for how a program is supposed to load/run/look, so it loads it faster; without them, it'd be like building it from scratch. However, over time, these caches can start to take up some serious space. Periodically, removing them can help clear storage. And don't worry, your Mac will create fresh, new ones after you restart your Mac. To remove caches:

Mac Air Storage Full

1. Open a Finder window and select Go in the menu bar.
2. Click on 'Go to Folder…'
3. Type in ~/Library/Caches
   Delete the files/folders that are taking up the most space.
4. Now click on 'Go to Folder…'
5. Type in /Library/Caches (simply lose the ~ symbol)
   And, again, delete the folders that take up the most space.

Deleting cache files is generally safe for your Mac. And once you delete them, the applications and processes you run on your Mac will generate fresh, new ones. But, when deleting, worry more about removing them based on size rather than just removing all of them.

Also, you can check the /System/Library/Caches folder as well, but it might be better not to touch this folder without knowing what the items are. A utility that correctly cleans up these files (and pretty much everything else on this list) is, you guessed it, CleanMyMac X. It cleans up even your system caches with just a few clicks.

Oh, and once you're done with this list, restart your Mac so it can create these new cache files.

Read more: How to Clear Cache on a Mac?

3. Get rid of localization files

Localization files are also known as 'language packs.' Lots of apps come with other languages that you probably don't need. Can pc and mac play minecraft together. To clear up space on your Mac, delete the ones you don't need:

1. Open a Finder window.
2. Go to Applications.
3. Ctrl+click on an application.
4. Select 'Show Package Contents.'

From here, go to Contents > Resources and look for files ending in .lproj. These are the languages your app has just in case you want to use it in another language, like Spanish (es.lproj). Drag the ones you'll never use to the Trash.

Again, a safer alternative to this would be to use CleanMyMac X. It gets rid of all of them with a click. No digging through application folders, just a cleaner Mac.

Read more: How to Delete Language Files from macOS?

4. Delete duplicate files

Even if you have the most organized Mac on a planet, duplicates happen one way or another. It can be a file you've mistakenly downloaded twice or a mail attachment you've opened several times. Regardless of how they appeared, those files sit on your Mac and gobble up storage.

But finding and deleting them is a time-consuming process if you do it one by one. So here's what you can do to save up time:

1. Open the Finder app on your Mac
2. Move cursor over File and click New Smart Folder
3. Click the '+' button in the upper right corner and choose the type of files you want to see
4. Now sort them by name to quickly spot duplicates.

Remember to pay attention to the date of creation to make sure you keep the true original, not the copy.

While this is the best way to remove duplicates manually, it takes lots of your time and dedication. It'd be much easier to leave this to Gemini 2: The Duplicate Finder.

This app quickly scans your Mac for duplicate and similar files and allows you to delete them within minutes. It keeps your originals safe and helps you easily retrieve files deleted by accident.

5. Remove old iOS backups

Backups can tend to take up a lot of space. You can find and remove them by:

1. Launching a Finder window.
2. Clicking 'Go' in the menu bar.
3. Selecting 'Go to Folder…'
4. Then, type in ~/Library/Application Support/MobileSync/Backup/

Get rid of all the old, outdated backups your Mac has been storing for a bit more extra space.

6. Remove iOS software updates

You can find all the unnecessary data for your devices by:

Mac Storage Space

1. Opening Finder.
2. Selecting 'Go' in the menu bar.
3. Clicking on 'Go to Folder…'
4. And entering for iPad ~/Library/iTunes/iPad Software Updates
   or entering for iPhone ~/Library/iTunes/iPhone Software Updates

Delete downloaded files for any of the devices that you are not using anymore, or ones which software just already updated. Remember that after any of your devices have been updated, you don't need those files.

Read more: How to Delete iOS Software Updates from Mac?

7. Remove unnecessary applications

This isn't often overlooked, but definitely under-appreciated. Removing old, unused applications is a great way to get some extra space on your startup disk. Go through your applications folder and get rid of all the apps you rarely use. But make sure you remove them correctly, don't just drag them to the Trash. If you do, you'll leave behind tons of leftover parts and pieces, and we're trying to get back startup disk space — It'll kinda defeat the purpose, no?

This is another place we'd suggest using CleanMyMac X. To completely remove any application, just launch CleanMyMac X, click Uninstaller, select your application, and then click Uninstall. You won't have to search all over for development junk that's left behind when Trash'ing an application. It's incredibly easy and saves you tons of time.

8. Clean up your photo library

Photos, photos, photos. Talk about tons of space! First and foremost, select only what you can get rid of, like image copies and maybe some photos that were mistakenly taken. You know, ones of the ground or something?

Ok, once your own files are taken care of, it's time to get rid of the files your system created. In Photos for Mac, it's cache files. In iPhoto, it's service copies. Both are a pain to find, but here's how you can get rid of them.

Photos cache includes iCloud local copies (created when you view pics from your iCloud photo library on a Mac), Faces cache (generated when you use Faces), and other app-related caches. You'd be surprised how much all that takes up if you regularly use Photos. For OS versions prior to macOS Sierra, here's the path to locate the cache:

1. Open Finder and navigate to your Photos library (normally, it's in the Pictures folder).
2. Ctrl+click your Photos library, and select 'Show Package Contents.'
3. Open resources, and then modelresource.

You should now see a lot more folders in your Finder window. Photos cache sits in these folders, but the tricky thing is that it's really hard to say what is safe to remove and what isn't. Deleting the wrong file can compromise the performance of Photos, which is why we highly suggest you use CleanMyMac X to clear the cache and system junk. It only removes files that are safe to delete, never a critical file or important image.

You can download CleanMyMac X for free and see how it works, it's so much safer than cleaning up system junk manually.

9. Clean up your Downloads, Movies, and Music folders

Have a closer look at these three folders. You'd be surprised at how many downloads can accumulate when you aren't paying attention. Clean out anything you don't need (or don't know) and organize the rest. It'll take a load off your mind to know that there's nothing excess there.

The Movies folder can be a pain, not because you're searching through tons of files, but it can be difficult to choose what to delete. Personally, I never want to get rid of Top Gun. It's amazing. I watched it 3 times in a row last weekend. But alas, sometimes you need to make sacrifices for the health of your Mac. Though, what you can do with movies you want to keep is to archive them. So, archive what you wish to keep and remove the rest.

How to archive/compress a file

Archiving a file doesn't mean to store deeper into the abyss of your Mac — but to turn the file into something smaller, into a compressed file (like .zip or .tar). By archiving a file, you shave off some memory. Archiving is essential for things you want to keep on your Mac, but don't often use, and helps you clear up some space. And that's what this is all about right? We're essentially doing the hokey-pokey on your Mac. To archive a file, just:

1. Ctrl+click the file you want to compress (recommended for movie files).
2. Select, 'Compress .'

The last place to sweep through is the Music folder. Find and remove duplicate music files first, and then clean up all the songs you downloaded on a weird Sunday afternoon cleaning the house.

10. Clean your Desktop

'Clean my desktop… but why?' Because some people's desktops are hard to look at, that's why. Organize your desktop and get rid of the stuff you just don't need on there. It looks better and helps your Mac act a bit faster (I don't know the rocket science behind this one, but it feels too good to be false). Your Mac doesn't waste time loading all those icons and junk, just… Just clean it, please.

11. Empty out the Trash (No, we're not joking…)

Seriously: It may sound incredibly basic, but it could clear a surprising amount of storage. I forget to do it all the time. The thing is, that when you delete something, your Mac doesn't remove it — it just moves it to the Trash. Plus, you've probably deleted way more than you realize, and all that could be sitting in the Trash, wasting space. So get rid of all that junk by emptying the Trash:

1. Ctrl+click your Trash in the Dock.
2. Select 'Empty Trash.'
3. And click 'Empty Trash.'

And, the easiest step is done.

A few more tips to clear storage on Mac

1. Manage your Optimized Storage

This option comes with your operating system starting macOS Sierra. Go to the Apple menu > About this Mac > Storage

Now, click on Manage to reveal the space-saving options:

2. Erase your Junk Mail

Open your Mail app, and click Mailbox in the upper menu. Here you can erase spam and already deleted items.

System Storage Mac

3. Delete system junk with CleanMyMac X
Again, this is an incredible utility when it comes to cleaning your startup disk. And this app is notarized by Apple, meaning it's safe.

To avoid the annoying 'your disk is almost full' error, download the free edition of CleanMyMac X.
Once you've installed the app, click on the System Junk tab. It will clean up caches, logs, language packs, binaries, duplicate photos, outdated backups, Trashes, and more.

Full Startup Disk Prevention

Mac Air Storage Full

We've cleaned up a few things on your Mac, and hopefully, it's given you more ideas as to what else you can clean. But, let's take a look at how much space you saved from cleaning the list above. Remember how we checked your Mac's free space? Open that window again and see how much space you've cleared up:

1. Click the Apple Icon in the menu at the top-left corner of your screen.
2. Choose 'About This Mac.'
3. Click Storage.
   Note - If you are running an older version of OS X you may have to first click 'More Info…' and then 'Storage'.

You've probably got a bit more space, and you'll want to keep it that way. The only way to prevent a 'your disk is almost full' is by keeping your Mac clean. We'd recommend a complete cleaning every 2–3 weeks.

Say goodbye to the 'Your startup disk is almost full' message.

So, we've now covered everything that we wanted to share with you. Hopefully, this has helped you fix that full startup disk problem. Your startup disk should now be quite a bit lighter (we hope). Oh, and if you liked this article, get social with it to help others in need. And if you really liked this article, subscribe to our email list — we've got more guides on the way. And we've also got a utility that'll help you out a ton in the long run: CleanMyMac X. It helps you clean your entire Mac with just the click of a button. It's incredibly easy to use and works like a charm.

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