As per the title. If I have a Mac running Sierra, what can/should I do if I don’t want to be upgraded to High Sierra?
I’ve already unchecked “Install macOS updates” in System Preferences:
but I’m wondering if there’s anything else I should be doing. (Or can do, because I’m not sure I trust that checkbox.)
This weekend, one of my Macs got unexpectedly upgraded from Sierra to High Sierra, but I don’t remember asking for the upgrade. (I say “upgraded”, what I mean is “freeze, crash, then reboot twice”. Is this a new installation procedure?) A bunch of stuff is now broken, yay.
I’m downgrading to a backup taken when my Mac was on Sierra. When I’m back up, I want to ensure I don’t get another unwanted upgrade.
Normally I would just follow a policy of “don’t hit the upgrade button”, but this weekend’s experience suggests that’s no longer enough. :-/