If your Mac is having problems, macOS has multiple keyboard combinations that you can hold to recover your system, start in safe mode, run diagnostics, and more. Here’s how to use them.
Apple’s macOS has long provided many key combinations you can hold down when your Mac starts. When starting up your Mac, you might want to choose a different Startup Disk, boot into Recovery mode, into a Boot Camp Windows volume, or use one of Apple’s built-in Mac utilities. Startup key combinations allow you to choose what runs when your Mac boots.
For all startup key combinations, the exact keys to press may be different depending on whether you’re using an Apple Silicon-based Mac or an Intel Mac.
Read more at AppleInsider.com