
MacOS Recovery Mode on an Intel-based Mac From a shutdown state, double-press and hold the power button to boot into Fallback recovery OS. However, it won’t allow you to change the system security state - which most of us probably shouldn’t mess with anyway. It’s the same process as recoveryOS boot, except that it boots to a second copy of recoveryOS that, in Apple’s words, “is kept for resiliency.” If macOS Recovery Mode didn’t solve your problems, you can give “Fallback recovery OS” a try. Choose “Apple menu () > Startup Disk.” To quit the app, choose Startup Disk > Quit Startup Disk. Startup Disk: Set the startup disk for the Mac.In the Recovery app, choose “Utilities > Share Disk.” Share Disk: Share the disk of a Mac that’s started up in macOS Recovery.To return to the Recovery app, choose “Terminal > Quit Terminal.” In the Recovery app window, choose Utilities > Terminal. Terminal: Change settings via the command line.To return to the Recovery app, choose “Startup Security Utility > Quit Startup Security Utility.”

In the Recovery app, choose Utilities > Startup Security Utility.

