Well, I say Mac, but in fact it’s a web browser game built in TWINE. It’s a narrative discovery game in the same sort of vein as Gone Home and Dr. Langeskov, The Tiger, and The Terribly Cursed Emerald: A Whirlwind Heist, the latter of which is by the same people.
As it’s TWINE, and therefore basically a text medium choose your own adventure, it isn’t as technically impressive as those other games. The story is fun, self referential and sarcastic. It’s short, I’m not sure it’s possible to not complete it (unless you just quit, I suppose), but it’s definitely worth a play. And it’s free, so you’ve no excuse. You can find it here.