Force your Mac to turn off and back on
Your Mac might be turned on but appear to be turned off, even though it's connected to AC power and a working display. Follow these steps.
- Press and hold the power button on your Mac for at least 10 seconds, then release. If your Mac is turned on, this forces it to turn off.
- If you see no change on your Mac, press and release the power button.
- If your Mac now turns on but stops at some other screen during startup, follow the steps for when your Mac doesn't start up all the way.
Revive the firmware, if applicable
If you're using a Mac with Apple silicon or a Mac with the Apple T2 Security Chip, in rare circumstances the firmware stored in your computer's memory might need to be revived or restored. To do that, you need these items:
- Another Mac with macOS Catalina 10.15.6 or later and the latest Apple Configurator app, available free of charge from the App Store.
- A USB-C to USB-C cable or USB-A to USB-C cable to connect the computers to each other. The cable must support both power and data. Thunderbolt 3 cables aren’t supported.
If you have those items, follow the appropriate steps:
If your Mac still doesn't turn on, you need help with these instructions, or you don't have the items you need, please contact Apple Support.