Hello. This morning I updated a 2010 Mac Pro 5,1 with the 10.14.6 Mojave update through the system preferences and everything went fine until after I had to restart the system, and now when I restart the computer up it chimes and leaves the screen black. I can tell a signal seems to be being sent because it normally has an orange flashing light on the power button of the BenQ monitor, but now it's solid orange. When I put the original ATI GPU back into the computer it boots up no problem. Does anyone have any suggestions on how to rectify this issue?
I do not want to reinstall Mojave as I am able to boot into the system by using the ATI card so I know the OS is still intact. It's just not recognizing the RX580 Sapphire card which I've been using for a couple of years now. Please help. I have read through the forums and I see something about 10.14.6 changing the Bootrom to something else. The Bootrom is currently at 138.0.0.0.0. I was unaware it would do anything like that so this is entirely my fault. I really could kick myself for updating as I know they're only problems for this GPU/Machine.
Also I've read some users saying something about an OpenCore. I have no idea what that is, so I'm kind of hoping that someone might have a clue as to what I may need to do in order to get the system to recognize the GPU card again. Please help.
I do not want to reinstall Mojave as I am able to boot into the system by using the ATI card so I know the OS is still intact. It's just not recognizing the RX580 Sapphire card which I've been using for a couple of years now. Please help. I have read through the forums and I see something about 10.14.6 changing the Bootrom to something else. The Bootrom is currently at 138.0.0.0.0. I was unaware it would do anything like that so this is entirely my fault. I really could kick myself for updating as I know they're only problems for this GPU/Machine.
Also I've read some users saying something about an OpenCore. I have no idea what that is, so I'm kind of hoping that someone might have a clue as to what I may need to do in order to get the system to recognize the GPU card again. Please help.
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