Has anyone been able to boot into Mojave with an MSI RX-560 (or any other metal video card) and also an HD 5770 installed in a Mac Pro (mine's 2010)? I just get black screens. I would like to know if its possible. The 5770 isn't connected to any monitors. I just want it in the Mac Pro so I can hook it up to get the boot manager screen when needed later. I've tried switching the slot positions of the 560 and 5770 and that was no help. Mojave works fine if I remove the 5770 board. Is there any way to get the Mojave boot process to ignore the 5770 when installed?