After Software Update Mac Wont Restart. In this case its sure that the Mac wont restart after update. If your Mac is stuck on restart after recent updates it may be due to obstructions in updates unsupported hardware or low space than the amount recommended for the new update.
Use Disk Utility to restore Mac from Recovery Mode when macOS High Sierra wont boot. Release the keys after 20-30 seconds during which your Mac might appear to restart. Resetting that data isnt harmful.
Command Option P and R and turn on the Mac.
It downloaded the updates and needs to reboot. I started my Mac mini from the install disc and then needed to do a software upgrade. Stuck In Restart Loop After Software Updates Oct 5 2009. When I click to reboot it freezes on the shutdown screen.