- Nov 14, 2020
Yeah, I can't figure it out. Theoretically, If I use your EFI, leave the type as MacPro1,1 then change the serial, board serial and UUID it should boot. It's a mystery.When I replaced mine I made the changes for the A520 to the EFI, shut down and swapped everything over to the new A520 board. It booted right up, all I had to do after that was map the USB, been working great! I upgraded from a Asrock A320 board with Ryzen 3600 to Gigabyte A520 with Ryzen 5800x. It's hard to troubleshoot over the internet sometimes, wish I could see it for myself. This is my 3rd hack and my second AMD, the first was intel. So sorry it's not working for you!
I will sort it eventually. It took me a few goes to get Catalina up and running. That was through trial and error but I had another working mac which enabled me to test changes to the EFO without needing to keep shutting everything down, change boards and test again.
Thanks so much for all your help though. I will let you know if I manage to figure it out