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How do I free up space on my startup disk?

I can't update my system because it says I don't have enough drive space. I copied two 13GB folders to a backup drive, then deleted them from my hard drive. But it didn't free up any space on the hard drive. Why not, and how do I free up space?

Posted on Nov 5, 2022 10:00 PM

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Question marked as Top-ranking reply

Posted on Nov 5, 2022 10:17 PM

See if the following support article can assist you with how to free up space on your Mac's system drive:

8 replies

Nov 6, 2022 2:25 AM in response to John Haley1

Rebuild the Spotlight index on your Mac


Or Force a Reindex via Terminal Command “ sudo tmutil -E / “ without Quotation Marks 


What is “Other” storage on a Mac, and how can I clean it out?


Free up storage space on your Mac


OmniDiskSweeper Safe to use


GrandPerspective 


How to delete Time Machine snapshots on your Mac


See used and available storage space on your Mac


Locate backups of your iPhone, iPad, and iPod touch


Notation - If the user is using a cloning software like Carbon Copy Cloner - suggest tweaking the Safety Net Feature in this software. It may be making additional Snap Shots that are not being Cloned to the Eternal Drive. If this should be the case, these Snap Shot could be using additional space on the drive 


The final word from Apple on Managing the " Other/ System Data “ Category


Other / System Data: Contains files that don’t fall into the categories listed here. This category primarily includes files and data used by the system, such as log files, caches, VM files, and other runtime system resources. Also included are temporary files, fonts, app support files, and plug-ins. You can't manage the contents of this category. The contents are managed by macOS, and the category varies in size depending on the current state of your Mac.

Nov 7, 2022 10:29 AM in response to John Haley1

The Rebuilding the Spotlight index may have performed negatively on increasing the Empty Space on the drive - that I agree to.


But it also gives a much more accurate overview of the Empty Space on the drive.


That can and would lead to the other options available to the user to explore - which you have mentioned you will try at a later date.

Nov 7, 2022 10:57 AM in response to John Haley1

John Haley1 wrote:

I can't update my system because it says I don't have enough drive space. I copied two 13GB folders to a backup drive, then deleted them from my hard drive. But it didn't free up any space on the hard drive. Why not, and how do I free up space?

Because the operating system will keep those deleted files in a local snapshot. It may take a day or two for the local snapshots to be automatically deleted and the files permanently removed.


However, 13 GB is an insignificant amount of storage. If that is all you have left, you are out of storage space. You do not want to try to update your system in this condition. If you can delete two chunks of 130 GB, then you'll have some room. You may need to purchase and external hard drive to archive these files or purchase iCloud Drive storage and start using that. Time Machine is a good backup, but it should not be used as an archive. If you delete files, they will eventually be deleted from your Time Machine backup too.

How do I free up space on my startup disk?

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