Im also facing this issue,
in my case 40Gb of data has been added to my System Data (Ive tried twice to download the Xcode)
Im also using the 12.1 Monterey version
If anyone knows what I should do in order to free up this data would be great, (clearing cache in library won't do it) I shall try to boot in safe mode and check my options.
HenryPap
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen