Parallels Desktop (PD) doesn't work when using Opencore Legacy (OCL). To be exact, if you have Graphics Patch installed, PD refuse to open. It keep Crashing and closes itself. I realized it after running PD just fine in the first minute after I finished update my old unsupported mac using OCL, and have PD just fine. But soon after I add driver to my Graphic Card (Start Root Patching Nvidia), PD refused to open. However "Revert Root Patches" bring back PD to open (with some quirks). Now I'm running PD without Graphic Card support, with restriction in screen resolution; is awkwardly 4:3. And overall slow without the proper Graphic Driver. Do you guys know how to run PD along with OCL Graphic Driver installed?