Finder reports I am running out of space

scubaguybc wrote:

Recently, I had to erase the Mac OS partition on my 1TB SSD (I have a 90GB partition used for Bootcamp). I have been advised to do this by Apple support to correct a problem with the machine that their Engineers could not figure out. I was also told not to restore from my TimeMachine backup as they felt the problem was due to some unknown, unidentifiable software issue. Long story shorter, I am gradually adding fresh installs of all my software. After only 95GB of installs, the 920GB allocated to the Mac partition is reported by Finder to be running out of space (shows 3.34GB remaining). When I look at the Disk utility it shows multiple volumes called "Macintosh DATA and Macintosh Snapshots". Which apparently are using the rest of the drive.

What are these and how do I get rid of them?

Add, delete, or erase APFS volumes in Disk Utility on Mac

if you have Two Macintosh HD - Data

from Disk Utility.app you can see the mount point

One will be mounted at /System/Volumes/Data this is the one you want to keep,

The other will be mounted at /Volumes and you can simply use the “ -“ to delete it.

ref: About the read-only system volume in macOS Catalina - Apple ... Big Sur add the SSV (signed system volume) this is your snapshot.

https://support.apple.com/en-us/HT210650