Hey there, another mac user who can't run the game here, although I was able to extract the game out of the .app.zip file, it was "damaged or incomplete" so I tried running the Windows version using WINE and may have come across at least part of the problem, being that the game is made using DirectX11, which (to my knowledge) there is no way to encode in a way that will run on Mac. Figured I'd at least mention it so y'all and the rest of the Mac users know.
(The Mac I'm on is a MacBook Air 13-inch, with a 1.7GHz Intel Core i5 processor, 4 GB 1333 MHz DDR3 memory, & an Intel HD Graphics 3000 384 MB graphics card)