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brinkeguthrie

macrumors 6502
Original poster
Jul 22, 2020
282
59
Usually at 103gb available. Briefly went up to 115gb. Restarted, back down to 103. Why does it do this?
Screenshot 2025-09-04 at 10.03.37 PM.png
 
System data can fluctuate. Mine right now is 89.56gb on a 1tb Mac mini with 81.48gb free space. I've seen system data take up over 100 gb at times.

This is what is in system data to better understand how it works:
AFPS snapshots from Time Machine
Temporary files
System and crash logs
Caches
Also, emails and attachments can fall in this category too since they are in hidden Library folders.
 
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