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Why does my IMAC keep rebooting?
Rarely, your Mac might experience a software or hardware issue that requires it to restart. Unexpected restarts are usually caused by software installed on your Mac, or by devices connected to your Mac. If the issue causes your Mac to restart every time it attempts to start up, your Mac might eventually shut down.
Why does my IMAC shut down every night?
The main reason for letting your Mac sleep instead of shutting it down is that your Mac can’t perform maintenance tasks during the night if you shut it down. macOS does a lot every night while your Mac isn’t being used and it is “sleeping”. Apple actually has a term for this sleep mode — “Power Nap”.
Why does my MacBook Pro keep restarting itself?
Unexpected restarts are usually caused by software installed on your Mac, or by devices connected to your Mac. If the issue causes your Mac to restart every time it attempts to start up, your Mac might eventually shut down. Use the steps below to check the software and hardware on your Mac.
Why is my iMac shutting down by itself?
This is especially true for EFI type updates. This usually results in a restart which is not what you said was happening. Instead you got a shut down to a cold start. If that is the case then the updates are not the cause of your problem. It is also possible that you could have a power supply failing.
What to do if your Mac won’t start up?
If the issue causes your Mac to restart every time it attempts to start up, your Mac might eventually shut down. Use the steps below to check the software and hardware on your Mac.
How do I schedule time to shut down my Mac?
Choose a day or group of days from the pop-up menu, then enter a time. Schedule a sleep, restart, or shutdown time for your Mac: Select the “Sleep, restart, or shut down” checkbox and choose the appropriate option from the pop-up menu on the left. Choose a day or group of days from the pop-up menu on the right, then enter a time.