This card worked, though. Here’s some proof:
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I believe I messed up a cable or something. Now no GPU’s are recognized. This is bad timing, because the macOS and the Windows side were recognizing the Xeon CPU.
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Ok. I wiped my old SSD. Got a clean fresh High Sierra. I just need to add the the modified AppleGraphics.kext using another a computer? (can not boot into anything on the iMac) and then switch the i7 2600 with the old i5 2500S stock CPU?
Lastly, before the installation of the Catalina patch, there’s only a way to disable ALL of the patch but how do I disable just the legacy video support? Do I have to let the installation run then disable the legacy patch or is there away to do it before the installation?
Also, also. Could I do all of this with another Mac and then plug the SSD into the iMac so I can be ready to go?
Apologies for the all the questions. As you can see, I am very inexperienced in this but I am learning quickly.