I made a bootable copy of my Catalinia onto a external hard drive.
When I try to boot from it I see the apple logo and the loading bar and it likes gets half way and I see the drive light go out, and the screen goes dark, and when I press any key the screen comes back
I have July 2019 MacBook Pro
I'm going to try and use that external hard drive that I have Catalinia on, and want to install Big Sur on it. so it dose not effect my current drive
When I try to boot from it I see the apple logo and the loading bar and it likes gets half way and I see the drive light go out, and the screen goes dark, and when I press any key the screen comes back
I have July 2019 MacBook Pro
I'm going to try and use that external hard drive that I have Catalinia on, and want to install Big Sur on it. so it dose not effect my current drive