I think you're talking about the certificate signing stuff which isn't technically the same as cross-compiling. But anyway, the whole topic I brought up is Val

I think you're talking about the certificate signing stuff which isn't technically the same as cross-compiling. But anyway, the whole topic I brought up is Valve's Proton layer which doesn't require cross-compiling the game to Mac OS. That's the whole reason I think that solution would be the best way to get decent gaming support on the Mac. Cross-compiling literally wouldn't have anything to do with it.