boot external in Monterey?
I have read that in order to boot to an external disk in Monterey, you need to shut down, and then hold down the power button, wherin you see all the boot disk options. I do that, and nothing happens. Why? The only way I am able to change the boot disk is System Preferences>Startup Disk>restart, which means you have to start out with a bootable disk.
iMac, OS X 10.11