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startup disk full

I keep getting the pop up "Start up disk almost full" or "Start up disk full." I have deleted or compressed all large files, deleted unused apps, cleared out caches, restarted my computer, and still continue to get this message. I can see that 160 GB of my storage is taken up by "Other." Is there any way to see what "other" includes? What else can I do to keep the disk from getting full?

Thank you!

MacBook Air 13″, OS X 10.11

Posted on Sep 28, 2020 12:29 PM

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Question marked as Top-ranking reply

Posted on Sep 28, 2020 12:39 PM

What is This Other Category in Storage Display


What is 'Other' and 'Purgeable' in About This Mac?


"Other" contains any of the following types of files. They cannot necessarily be deleted wholesale. Furthermore, “Other” is not an actual, physical file. Rather it’s an arbitrary category to which the files are assigned for display convenience.


  • System temporary files
  • macOS system folders
  • Archives and disk images (.zip, .iso, etc.)
  • Personal user data
  • Files from the user’s library (Application Support, iCloud files, screensavers, etc.)
  • Cache files
  • Fonts, plugins, extensions
  • Hidden files
  • Other files that are not recognized by a Spotlight search


Get Correct Storage Information


Do not use the information from the Storage section of the About This Mac dialog. Ignore the Storage information as it is typically wrong. To find out the correct information for any disk: Select a Desktop disk icon. Press Command-I to open the Get Info window and look at the topmost panel displayed. You will find the disk information displayed for Capacity, Available, and Used. If you have more than one disk/partition then repeat for each one on your Desktop.


The categories found in the Storage section of About This Mac is simply an arbitrary way of displaying files on your drive. There are no such categories actually on the drive.


How to Free Up Space on The Hard Drive


  1. You can remove data from your Home folder except for the /Home/Library/ folder.
  2. Visit The XLab FAQs and read the FAQ on freeing up space on your hard drive.
  3. Also, see Freeing space on your Mac OS X startup disk.
  4. What is 'Other' and 'Purgeable' in About This Mac?
  5. Files That Make Up the 'Other' Storage Category, and How to Remove Them
  6. Free up storage space on your Mac.
  7. See Where did my Disk Space go?.
  8. Be sure to Empty the Trash to recover the space.
  9. Replace the drive with a larger one. Check out OWC for drives, tutorials, and toolkits.
  10. Use OmniDiskSweeper or GrandPerspective to search your drive for large files and where they are located.


If the disk becomes filled to the point where you no longer can delete files or empty the trash, then the only solution is to erase the drive and start from scratch. You will lose all your files if you don't have current backups.


1 reply
Question marked as Top-ranking reply

Sep 28, 2020 12:39 PM in response to Linz4696

What is This Other Category in Storage Display


What is 'Other' and 'Purgeable' in About This Mac?


"Other" contains any of the following types of files. They cannot necessarily be deleted wholesale. Furthermore, “Other” is not an actual, physical file. Rather it’s an arbitrary category to which the files are assigned for display convenience.


  • System temporary files
  • macOS system folders
  • Archives and disk images (.zip, .iso, etc.)
  • Personal user data
  • Files from the user’s library (Application Support, iCloud files, screensavers, etc.)
  • Cache files
  • Fonts, plugins, extensions
  • Hidden files
  • Other files that are not recognized by a Spotlight search


Get Correct Storage Information


Do not use the information from the Storage section of the About This Mac dialog. Ignore the Storage information as it is typically wrong. To find out the correct information for any disk: Select a Desktop disk icon. Press Command-I to open the Get Info window and look at the topmost panel displayed. You will find the disk information displayed for Capacity, Available, and Used. If you have more than one disk/partition then repeat for each one on your Desktop.


The categories found in the Storage section of About This Mac is simply an arbitrary way of displaying files on your drive. There are no such categories actually on the drive.


How to Free Up Space on The Hard Drive


  1. You can remove data from your Home folder except for the /Home/Library/ folder.
  2. Visit The XLab FAQs and read the FAQ on freeing up space on your hard drive.
  3. Also, see Freeing space on your Mac OS X startup disk.
  4. What is 'Other' and 'Purgeable' in About This Mac?
  5. Files That Make Up the 'Other' Storage Category, and How to Remove Them
  6. Free up storage space on your Mac.
  7. See Where did my Disk Space go?.
  8. Be sure to Empty the Trash to recover the space.
  9. Replace the drive with a larger one. Check out OWC for drives, tutorials, and toolkits.
  10. Use OmniDiskSweeper or GrandPerspective to search your drive for large files and where they are located.


If the disk becomes filled to the point where you no longer can delete files or empty the trash, then the only solution is to erase the drive and start from scratch. You will lose all your files if you don't have current backups.


startup disk full

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