[Fixed] Your System Has Run Out of Application Memory on Mac

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Clare Weaver
May 13, 20224 min read

Summary: From this blog, you will get to know how to fix the "Your system has run out of application memory" issue on Mac.

Nothing is more irritating than being interrupted by a message that says your system has run out of application memory, and you should quit the apps you are not using. Basically, you won't receive this message again after you quit some apps. However, if you still receive this alert and don't know what to do, follow this guide to learn how to fix it.

[Fixed] Your System Has Run Out of Application Memory on Mac

What Does "Your System Has Run Out of Application Memory" Mean?

It means that there is not enough memory to run apps. And the reasons can vary. Here are some of them.

  • You are running multiple apps at the same time.
  • There is not enough storage space available.
  • You have too many browser tabs open.
  • An application is taking up too much of your memory space.
  • There are bugs in macOS.

How to Check Memory Usage on Mac

Now that you know the meaning of Mac running out of application memory. Let's take a look at how to check your memory usage on Mac.

  1. Open Activity Monitor via Launchpad or Spotlight.
  2. Click on the Memory tab, and you will see how much memory space each process is taking.
  3. Under the list of processes, you will see a graph that shows you the memory capacity, the amount of memory used, and the pressure on your memory.
Check Memory Usage on Mac

How to Fix "Your System Has Run Out of Application Memory" Issue on Mac

1. Quit the Apps You're Not Using

Too many apps running in the background can consume a lot of your memory space. It is necessary to quit the unused apps instantly.

From the Force Quit Applicationss list, select the apps you want to quit and click the Force Quit button.

If the error message persists, move on to the next step.

Force Quit the Apps You're Not Using

2. Restart Mac

Restarting is the easiest and most effective way to fix any problem with your Mac. Files like cache and temporary files are automatically cleared when you restart your Mac.

If the problem is not solved, read on.

3. Clear Disk Space

Another method you can try is to clean up your disk space. When you launch an app, it will create swap files on your hard disk. If you are running out of storage space, it may cause the application not to run properly.

Typically, to keep your Mac working properly, you should save at least 15% of your storage space. Otherwise, you may see a gradual decline in your Mac performance.

There are many ways to free up disk space and among them, using BuhoCleaner is the most effective way. BuhoCleaner is one of the best Mac cleaners that can clean and speed up your Mac with just a few clicks. No commands or specialized skills are required. Just download it, launch it, scan your drive and move the unwanted files.

Clear Disk Space with BuhoCleaner

4. Close Unused Browser Tabs and Extensions

You may have many tabs open but forget to close them. They are constantly using your memory space in the background. It is recommended that you close them in time.

In addition, to improve your browser experience, you may have many extensions installed. These extensions start automatically when you open your browser. If some extensions are useless for you, don't forget to go to the settings and remove them from your browser.

5. Uninstall Unwanted Apps

Do you know that programs like Photoshop, iMovie, and Microsoft Office can take up to gigabytes of space? If there are useless apps, don't forget to delete them from your Mac.

For detailed steps, see How to Completely Uninstall Apps on Mac.

6. Update macOS

Bugs in macOS can also cause Mac application memory to run out, which is proved in macOS Monterey.

In this case, you can go to update your macOS to the latest version to check whether the error has been fixed or not. But before performing the update, back up your Mac first to avoid any risk of losing data.


Have you resolved the "Your system has run out of application memory" issue on your Mac? If unfortunately not, try resetting NVRAM/PRAM or starting your Mac in safe mode.

We also have an article: How to Lower Memory (RAM) Usage on Mac, from which you can get more tips to reduce memory usage. Go ahead and check them out.

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