Black/pink screen after macOS 10.15.5 boot from USB

melodian

New member
Joined
Aug 5, 2020
macOS
10.15.5
Mobo
Gigabyte B365M DS3H
CPU
Intel Core i5-9600K
#1
I am setting up a new desktop with macOS Catalina, and am currently working on getting it to boot from my bootable USB. I get through the boot okay; however, whether in verbose mode or not, when it finishes booting, after a brief black screen, the standard Mac start screen (with the Apple logo and the loading bar) flashes on screen, except the background is pink and the logo and bar are green. The display then turns off completely and the PC does nothing else until I turn it off. What could be causing this?