Oh hell yeah, Mac version of the game. I'm trying out the Intel Version, and I'll be sure to let you know if there are any bugs or problems as I play. Even if it doesn't run, you have my thanks for even trying to make a Mac version, they're often overlooked since 85% of people with a computer have a Windows computer.
Ah, now I don't know much about Macs, but are you correctly using the .dmg file? From my understanding , the .dmg file won't actually open the game, it instead mounts itself to your file system/explorer, which in turn contains the .app file of the game.
The reason I say this is because you described what I think should be intended behavior. If it truly doesn't work, please send me a message on Discord if you can.