I bought this here recently (for Mac), but I am having multiple troubles just getting through the options and main menu. I can't escape the Controls section of the options menu even when I press Escape (as the menu tells me to). I can't enter the Video section of the options menu, nothing happens when I try to. And when I try to start a new file, the game just goes black and freezes after attempting to load for a bit. I can't even play the game. (Additionally, having tried all of this repeatedly without success, I am frustrated that I'm hit with several bright flashes of light each time before I can even get to the accessibility options menu to turn those down.) I am very disheartened and I don't know what to do.
(Edit as of 6 months later: I upgraded to a newer computer with a newer OS and it still doesn't work, same problems. I really don't recommend getting this for Mac.)