The game is great, but it seems really slow on mac (MBP running mojave), even at the lowest resolution / low end graphics. I've played firewatch and the witness with no problems.
Hey, sorry to hear that... Not looking for any excuse but since the game was made in under 14 days, I have to admit I skipped the optimization part a bit :D The game relies heavily on the GPU and with a good CPU only, I think it'll still lag at some point...
I've uploaded a new version (1.0.5, you can check it by pressing Esc and opening the pause menu) with a slightly better optimization for Mid-end and Low-end quality (having to do with water reflection mostly) and I've added a performance setting which is the lowest I can go (no water reflection, no decals, almost no grass, no background meshes, low fog quality). Tell me if it helps!
Cheers!