Macbook Air M1 issues
I recently got my mom a Macbook Air M1, upgrading from a 2010 Macbook Pro (High Sierra).
When migrating over from High Sierra to Big Sur, using Migration Assistant (my Synology TimeMachine kept on failing -- but besides that, migration went smoothly) two issues came up that required calling Apple.
But first off I noticed that when migrating, for some reason FileVault was turned off (more on that later). I, obviously, turned it on.