What :0 oh no. The game is also on steam for mac, could you check if it works there? So far we've had no report of the mac version not working. We'll investigate :)
One user here on itch wrote "try moving the app to a different folder and then running it" maybe that will help you? It works on our Mac so we're a bit lost on where to troubleshoot :D
Hi there! Actually, today I managed to get the itch.io version working on Mac! If you run the executable file in >show package contents and then Contents/MacOS (just for the first time) then it will work forever :)