If you are upgrading to Catalina you must do some things in the ist file on the EFI partition. NOTE3: I have confirmed that Open Core Version 0.5.9 works with my 4,1-5,1 cMP. I have not confirmed if Mojave got the same code update so use at your own risk. You will still have full hardware acceleration without the boost code now on 10.15.5. NOTE2: After some investigation it was found that Apple put the Radeon Boost code into the latest update to Catalina so therefore you need to remove the Radeon Boost code from the ist file before updating. This guide will be updated soon to address these issues and make updating safe. NOTE1: Some issues were observed with the 10.15.5 Catalina update and OpenCore. This article may be updated in the future but it is not planned. For the latest updates and files please check the following sources: OpenCore has changed a LOT since this article was written.
