Fix Mac Startup Disk is Full on macOS Mojave: MacBook Pro, Air

Probably this is the only problem which has got a lot more flexible solutions to fix it. Every Mac user has faced Mac startup disk a full message at least once while using Mac or MacBook Pro or Air. Don’t worry it isn’t a big deal; we can quickly fix you have to go through this guide and get rid of Mac startup disk is a full error in Mac.

However, if you avoid “Your startup disk is almost full” message from the Mac you will again going to receive. So it is better to resolve this permanently. Read on to fix to make more space available on your startup disk, delete some files.

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You might get following Symptoms:

  • Mac Startup disk is full won’t boot or won’t start
  • Mac startup disk is full with a white screen
  • Sometimes your Mac says startup disk is full but it’s not overloaded

These all types of issues you can be resolved through my given free troubleshooting. Hope this may help you to get success.

How to fix Mac startup disk is full on MacBook Pro/ MacBook Air/ iMac 

Mac Startup Disk is Full on macOS

Fix 1: Get an overview of Storage

First off, we will check out what are those files eating up the storage of your Mac. Analyzing the used storage and remaining storage helps us to take action against what to delete and what not to and get rid of Mac startup disk is full. To do so,

Step #1: Click on the “Apple” icon and then select “About This Mac.”

Step #2: There you will see the “Storage” tab, click on it.

Precisely take a look on categories like Photos, Others, Apps, Movies, Audio, and Backups.

Fix 2: Track Down large files and Remove it

The first fix will only give you a review of how much space is occupied by which category. In this troubleshoot we will directly look search the big files eating up area. From there if you don’t need that large size files, you can immediately delete it and free up some space.

Step #1: Launch “Finder.”

Step #2: Now, open any folder and then bring up finder search by pressing Command+F.

Step #3: From there you have to select “This Mac” and then go for “File Size.”

Step #4: Also select “is greater than” option along with choosing the size like 1GB or 2GB or 500GB.

If you found any garbage file or the file which is no longer useful, then you can delete right from that window by dragging to Trash or pressing Command+Delete.

Fix 3: Clear the Downloads folder

Mostly we have a habit of downloading files, and often after using it we don’t delete it from Mac, and so it occupies one crucial part of your storage. Get rid of archives files and zip files and images and videos which are not necessary for you. Go and look at your Download folder and delete the files.

Fix 4: Empty Trash on Your Mac

I always delete the unnecessary when I receive any message like your Mac storage is full, or your Mac startup disk is full. Deleting those files isn’t enough if you want to make some space on your device. When you delete any data from the Mac, it gets stored in Trash folder of your PC. So you have to also clear the Trash and then only you will get some free storage, or we can say more space.

Fix 5: Clean Cache files on Mac

Cache files are the ones who help your Mac to run smoothly, without cache files it might be difficult to run applications. On the other hand, it consumes a lot of storage.

However, if you periodically delete these files, then it will make some space free. Are you thinking about what after deleting this cache files? Will your Mac function properly? Off course, when you restart Mac, the new cache files will be created in Mac.

Step #1: Open “Finder” and click on the “Go” menu.

Step #2: Then click on “Go to folder.”

Step #3: Enter the following path,


Step #4: Delete the cache files which are taking more space.

Step #5: Go back to “Go to folder” and again enter the following path,


Step #6: Similarly delete the files which are eating most of the space.

Fix 6: Remove old Backups

If you regularly take backups of iOS devices and also of Mac then remove the old files and only keep the recent backup file, in case if you need later.

To remove iTunes backup,

Step #1: Launch “Finder.”

Step #2: Click on the “Go” menu.

Step #3: From the drop-down menu select “Go to folder.”

Step #4: Type the path,

~/Music/iTunes/Previous iTunes Libraries

Step #5: You will see the backups with dates. Delete the old ones.

To remove iOS backups,

Step #1: Follow the same above steps up to step 3.

Step #2: Now enter the path,

~/Library/Application Support/MobileSync/Backup/

Step #3: Remove all the old backups from there too.

So, I guess that this cover story solved your Mac Storage issues.

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