No. You would be free to compile your copy of the Unreal Engine, but without the ability to use Apple development software, it would be impossible for Epic to c

No. You would be free to compile your copy of the Unreal Engine, but without the ability to use Apple development software, it would be impossible for Epic to continue developing the engine on Mac. The end result is that the engine would not continue to develop on Mac, and would eventually likely stop functioning.