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Reply to External bootable of Catalinia not booting
Don't think so I went I try and boot to the external Catalinia drive it gets to the load bar then the hard drive turns off, and computer turns off. I booted into recovery and reinstall Catalinia on the external hard drive, and it was fine booting up from the external after I did that but after I shut down my mac and tried to boot it back up to the external hard drive it went back to shutting down the mac again. I will try and reset the PRAM
Jun ’20
Reply to External bootable of Catalinia not booting
I have cloned my drive storage from my July 2019 13 inch Macbook Pro to a external hard drive. I want to use that external hard drive and install macOS Big Sur on it to test it. When I try to boot from the bootable copy off the hard drive it dose not boot,  I have the drive plugged in and hit power then hold option then select the drive I want then it goes to the apple logo and the loading bar and it gets halfway through then I see the hard drive like turn off and then my mac turn off
Jun ’20