Here's what ChatGPT has to say about purgeable space on your max internal HD:

Purgeable space on your Mac includes files that macOS can remove when needed, such as iCloud files, Time Machine snapshots, and system caches. To clear this space, you can restart your Mac, disable and re-enable 'Optimize Mac Storage' in iCloud settings, manually delete Time Machine snapshots using Terminal commands, or use third-party tools like CleanMyMac to automate the process. Be cautious when using Terminal commands and ensure you have backups before making significant changes.


- Brad -

On May 8, 2026, at 15:26, 'Andrew' via MacVisionaries <[email protected]> wrote:

Yes, I have restarted/rebooted my mac but the result is still the same.

Andrew 

On 8 May 2026, at 02:10, Jonathan Cohn <[email protected]> wrote:

Try doing. a reboot. The Electric Light Company web site indicates this cleared out his purgable   disk space. 

https://eclecticlight.co/2023/04/15/what-is-purgeable-disk-space/

On May 6, 2026, at 1:45 PM, 'Andrew' via MacVisionaries <[email protected]> wrote:

Hello,

I have macbook air M1 with 250GB hard drive.  I’ve been getting messages that my hard drive is nearly full.  I use dropbox and icloud to store most of my files.  When I go to “get info” for my hard drive, what I hear is the following: "89.64 GB (71.81 GB purgeable)”. If 79 gb is purgeable, how can I purge it?  I am mystified.  What in the world takes up 79gb of space on my hard drive?  This seems absurd.  Please help if you can.

Andrew

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