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Why does my IMAC turn off when I turn it on?
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.
How do I start my IMAC in safe mode?
Start up your Mac in safe mode
- On your Mac, choose Apple menu > Shut Down. After your Mac shuts down, wait 10 seconds.
- Restart your Mac, then immediately press and hold the Shift key.
- Release the Shift key when you see the login window.
What do you do when your iMac screen goes black?
You need to Press shift + control + option + power button simultaneously for one or two seconds. After stop pressing four keys, push power button to start Mac, and iMac screen will not go black.
Why does my MacBook Pro not shut down?
The Mac operating system needs to close all apps before it can shut down. Problems in the Shut Down process are sometimes caused by apps that fail to close. This is often because the app has an unsaved document in it.
Why won’t my Mac restart?
Since macOS can shut down only after all apps are closed, sometimes Mac won’t shut down or reboot issues can be caused by unsaved files or frozen/crashing apps. If caused by unsaved files: Check the Dock to see if there are any bouncing app alerts.
How do you shut down an iMac computer?
You have three ways to shut down your Mac: Choose the Apple key→Shut Down. A dialog box appears, asking whether you’re sure you want to shut down. Click Cancel or Shut Down. (If you don’t click either option, your Mac will shut down automatically after a few minutes.) Press Control+Eject (or press the power button).
How do you restart a MacBook Pro?
Turn on or restart your MacBook Pro. Hold down Command and R at the same time right after you restart your Mac. Keep holding down the keys until your Mac finishes loading and you see the macOS Utilities window. Click on Utilities in the Menu Bar on your MacBook Pro. It’s in the upper left of your screen.