If you're using a Mac with Apple silicon, the startup options window appears when you turn on your Mac and then continue to press and hold the power button.
Here's what you can do in startup options:
- Select a startup disk, such as Macintosh HD, which is the disk your Mac starts up from by default. Then click Continue to start up from that disk.
- Select Options, then click Continue to open macOS Recovery. From there you can reinstall macOS, use Disk Utility to repair your disk or erase your disk, and more.
- Click Shut Down or Restart.
These hidden features are also available in startup options:
- Select a startup disk, such as Macintosh HD, then press and hold the Shift key while clicking “Continue in Safe Mode.” Learn about safe mode.
- Press Command (⌘)-D to open Apple Diagnostics.