Yea I am on a Mac and I can't play the game too.
We've uploaded a new version of the MacOneEnding. If this still doesn't work, our team will meet up tomorrow (online) to discuss this.
I tried again with the new one. It still does not work, because it says that the game can't be found for some reason. Thank you for looking into it anyway, I still backed the game because it looked interesting.
