Can someone explain to me like I’m 5. Updated my Mac Pro 6,1 via OCLP to 15.3 works great. Decided to update to 15.3.1 using system settings and it fucked it. Reset everything and used original USB to get it back on 15.3 and success. Made a make installer of 15.3.1 so now when I boot and hold option and choose EFI boot it goes to log in screen and I get the message “you are booting from a usb do you want to boot from your computer”? So what am I doing wrong
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