macOS updates sometimes don’t work out right. What can you do to revert to the previous release? Did I hear you mention snapshots?
snapshot
Have you checked how much free space is on your startup volume after the last update? Do you wonder where it has all gone?
Disk structure diagrammed for comparison, from the partition table, to HFS+ and APFS volumes, with further references.
What you need to know about the APFS file system, its containers and volumes, so you can understand errors and how to repair them.
Whether it’s a full macOS update, or a small Security Update, it can go wrong. Here’s a systematic guide to the solutions you can try to restore normal function.
Provision of maintenance procedures and tools is at the heart of software engineering, but not in macOS.
Time Machine has been using snapshots since High Sierra. How can it then use them to make backups to APFS volumes in Big Sur?
Here are several good reasons that Big Sur will need more storage space than previous versions of macOS.
Trying to discover the effective size of a snapshot proves baffling, particularly when the Finder claims it’s almost astronomical.
Updating Big Sur can cause the storage required by the system to double in size. Snapshots appear to be the cause. What’s the solution?
