Encrypted APFS clones

[jmsgwd]

OK, I did boot from another drive - the clone - in order to test it.

Now that you mention it, when I booted up from the clone I did notice Time Machine starting a backup, up so I clicked "Skip This Backup" to stop it.

I don't recall this happening before, but maybe I just didn't notice it before - or maybe I was lucky.

I wonder if Time Machine starting up on the clone caused it to do a full re-sync next time it ran on the primary drive - and if so, how to prevent it happening in future. Maybe I should just turn off Time Machine, immediately after booting up on the clone.

[dnanian]

Again, any behavior here is undocumented by Apple. It's hard to know what it might or might not do.

You can, of course, use tmutil from a before/after copy script to do things with Time Machine. You could, for example, turn it off before copying and then turn it on after. That could potentially have it be off on the backup. But, any copy failures would leave TM off, which you'd have to watch out for.

[jmsgwd]

OK, thanks for the suggestions.