Sorry for the late response, I've been away.Hello Syncretic:
I trust you are well. Am I understanding that by downloading your patch I can now install Radeon Cards into my Macpro 3,1 running Mojave without a problem? If so, do I just download your script first, remove my old card, install the new card, and then restart my computer?
Please advise when you have a moment.
Thank you.
Not all Radeon cards need SSE4.2, only the newer ones (I'm not sure exactly which cards are affected). If you're using the DosDude patcher to install MacOS, it will install MouSSE for you (that's the simplest way). If you want to install it manually, follow the instructions in the first post of this thread. You'll need to install MouSSE before you switch video cards (i.e. while your old card is still in the system).
What video card are you planning to install? MouSSE will only help if the card is supported by the MacOS driver.