I apologize if this bothers you, but I've followed the directions on how to bypass the loading screen, you often get stuck at. I'm now stuck on the grey screen... 
when I screenshoted it took my mouse icon off the screen..
Viewing post in Opening the game on Mac comments
No need to apologise, it's not a bother at all! I just wish that it was as easy to get stuff working for folks on mac as it is for windows x3
Now, it's great that you managed to get to that point at least because it means the game is actually running, which is the first hurdle, haha. Have you tried the same steps but with the alternative download titled 'Possible Black Screen Fix (Mac)'?
I only ask because there's an unfortunate rare issue with some systems on both windows and mac, where for some unknown reason, the system a player is running just refuses to load the video background for the title screen (it's only a .mp4 video file, so I have no idea why certain computers won't play it o.O) In order to fix that for the people experiencing it, I replaced the title screen's video background with a static version which is just a .png file instead, and it seemed to fix the issue for people using windows. I made the same fix for mac, but I haven't had confirmation from anyone if it works yet >.<
Sorry for all the hassle you've got to go through just to get the game to run :( I really appreciate the support and I hope you can manage to get it running :3