Mac version will be available today. I don't have Mac OS so I can't check if the game works on Mac.
I think the problem is that I made Mac OS build on Windows. Here is an solution from the internet:
I needed to make the actual executable in the .app folder, well, “executable”. Please try:
Open up a Terminal and navigate to your app folder:
cd <PATH_TO_YOUR_APP>/<APP_NAME>.app/Contents/MacOS/
This folder contains the actual executable file which Windows apparently didn’t make executable. Let’s add the executable flag:
chmod +x <APP_NAME>
Afterwards I could start the app.
Unfortunately, I never had a Mac OS and never used it so I don't know what else could be causing it.