My Mac turn on and turn off back and forth, what should I do?
It doesn't work, trying to loading and then sound and turning off
iMac 21.5″, macOS 11.6
oksana1726 Said:
"It doesn't work, trying to loading and then sound and turning off: It doesn't work, trying to loading and then sound and turning off"
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Start with Safe Mode:
In Safe Mode, Login Items do not run at login, certain preferences are set aside, and damaged system files are then reset. So, once booted in to Safe Mode, wait 30 seconds, and then boot up normally, attempting another login. For instructions, go here: How to Use Safe Mode on your Mac - Apple Support