So if you have a Big Sur Mac and you’re happily backing up to an APFS volume with Time Machine, what will happen when you migrate to a new Mac? There appears to be very little knowledge out there. What is known is that things have changed considerably compared to the HFS+ days. I realize not many have bought a new Big Sur Mac since Big Sur came out, but there must have been a couple people who tried this. Hoping to hear back here.
If we assume you don’t buy an entirely new TM disk along with your new Mac (say because you’d prefer to have immediate access to your old backups), what will happen once you tell TM on the new Mac to back up to the previous TM APFS volume?
a) It just keeps going copying only what has changed and you see the backup tree as just one continuous tree.
b) It starts a brand new backup tree thus anything you had on there before just remains in place (and thereby reduces available space on that disk)
If it’s option b), does that mean you can no longer access the old backups from the new Mac? Or, in case you can indeed access the old backups even from the new Mac, does that involve “Browse Other Backup Disks…”? It’s technically not another disk so I assume that’s not it. But how then do you on the new Mac get to files that were backed up on the old Mac?