Open Core Legacy Patcher manual install failure now cannot recover HELP!!

[Guest Paulmitchell64]

Followed the instructions on this page Building and installing OpenCore | OpenCore Legacy Patcher

Used bless command to make patcher startup screen the default. Now when I reboot after the chime I see the OCPL start up picker screen for about 5 seconds and then I switches to a black screen with a white prohibited sign and then a few seconds after computer shuts down. I imagine it is a graphics card issue?

 

Im on a Mac Pro 5,1, with Sapphire metal GPU, which up until yesterday has...

 

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Source: MacRumors