QUESTION :
I am running macOS Sierra (10.12) and I lost a backup I made in May 2019. I am not sure if it was encrypted or not.
Is there a way to find out if it was encrypted? Is that logged somewhere in the macOS?
ANSWER :
It might be worth checking in the prefs… System prefs > Time Machine > Select Disk…
If the drive is remembered in there it should say below whether backups are encrypted or not. [I can’t test for a missing drive, it shows for mine in situ, even without the actual drive selected.]
