I just discovered the same thing. Can you tell us when there will be the mac version on Steam ? ?.?
We don’t know yet, sorry! But it’s not going to be anytime soon, as we require additional assistance to figure out the issue. If you want to play and you have a MAC, it’s best to purchase here on itchio (or if you have already purchased, request a refund and purchase here on itchio instead).
I believe there should be a warning if the game is not compatible with your device when purchasing on Steam?