I have Parallels 15 installed with Windows 10 on an 2019 iMac running Catalina (all software has most current updates). I also am using Steam to play games under Windows 10 and for the life of me I can't get Doom BFG (which has the original Doom, Doom 2 & 3 combined) to start. It apparently installs fine but that's it. I get the very initial start of the ID Software slash screen with a bit of sound, then a gray screen with no error message (aside from a Windows message about this program needing to close). I have tried changing the properties of the EXE file so it runs under Administrator and simulating various early versions of Windows (XP, 7, 8) but never gets past the gray screen. Any suggestions?
