Installing Bur Sur from USB fails (I think the same way as when installing from internet but fails) Installing Catalina from USB fails at the beginning with error 1008f Doing ShiftOptionCommandR fails with some error like 1008f orUpon downgrading to Mojave from Catalina, my password wouldn't work This meant I couldn't transfer my backup to my new Mojave OS I can log in to I have been on macOS Big Sur for a week and decided to downgrade back to Catalina My mistake was erasing both Machintosh HD and Macintosh HD Data in order to perform a clean install while not allowing to boot from external drive Now I don't have the option to enter Recovery Mode
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