Restoring a 2011 iMac
I have a 2011 iMac that won't completely start up. the progress bar either gets 80% of the way across and stops or seems to go all the way but still stops. I can boot the unit on Disk Utility but running first aid did nothing for the problem. I'm afraid to just randomly try things and get deeper in the hole! Any suggestions? I'm trying to get the unit up and running and then wipe it clean to pass it along.
iMac 21.5″, macOS 10.12