The problem is Spidermonkey for windows, as their build is pretty opaque, and they started calling some Windows APIs breaking compatibility. You get a nasty err

The problem is Spidermonkey for windows, as their build is pretty opaque, and they started calling some Windows APIs breaking compatibility. You get a nasty error if you try to run something there about a missing Kernel32 function For macOS, you can actually build for > 10.12 BUT the build will only be compatible with this. See https://code.wildfiregames.com/D2827 https://code.wildfiregames.com/D2827 for more info about why the SDL2 broke stuff.