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CodeRush UEFIPatch not working


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Hello, I am trying to install macOS High Sierra on my PC with the following specs:

 

  • Motherboard: ASUS X99-A II
  • CPU: i7-5820k
  • Graphics Card: GTX 750 Ti

 

I have to do High Sierra because I have a GPU that requires NVIDIA Webdrivers which don't work on Mojave or Catalina. I was following this guide here, but I couldn't get the part where you have to use Coderush's UEFIPatch to patch the BIOS file. The patching process finishes, and I rename the BIOS file to "X99A2.CAP" and put it on a USB formatted as FAT32 and GPT, I plug it in to the BIOS Flashback port and press the BIOS flashback button, and it blinks about 5-6 times then goes solid. I then try to flash it from inside the BIOS itself and it says "Selected File is not a proper BIOS!". Does any one know what is going on? BTW I am using BIOS 2101.

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