Select ‘Startup Security Utility’ and you’ll get this screen…Ĭhange the settings for both to the same as the image above.Įxternal Boot to Allow booting from external media Yaaay! You entered a secret level with hidden powers!Ĭlick on Utlities (on the menu bar at the top of the screen, don’t click on Disk Utlities in the middle of the screen) Keep holding them through the chime sound until you see the Recovery Screen below… To access Recovery Mode, turn off your Macbook, turn it on and hold the Command (⌘) and R keys.

You CAN boot a 2018 to 2021 Macbook Pro from USB!īut it does take a few steps to get there. Starting in 2018 the Macbook Pro includes a secure boot chip that prevents your Macbook from booting windows, linux, BSD, gentoo, Fedora, Atlas Supervisor, other Mac O/S/s on a usb, etc.