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Dear All, I need some help getting a Flashed for MAC R 580 to work or checking he is broken. I read more problems with Flashed for MAC Radeon 580 8Gb GPU in a Mac pro 5.1 and I have that too. My mac pro 5,1 is with Boot ROM 144 SMC 139f5 and Mojave installed and one boot vol Catalina and cant make it run steady. If I boot Mojave with a flashed 7970 no problem at all and with the 580 it not running good. Rebooting after some time or i got full colored screens. Green Red Orange or blue… Even tried to switch the dual Bios switch to quiet or normal game mode. No diff. I connected the 580 GPU with a specials dual 2x 6 pin to 8 pin cable like written everywhere. Cable came with it. How i fix this or can I check the Flashed for MAC 580 in a normal PC? Thx sofar.
I am not aware that the Radeon HD 7970 was metal capable which is needed for Catalina. Will the Sapphire 580 run Mojave OK? Who flashed it?
