itch.io

The game unfortunately doesn't run on a mac, but I believe there are emulators available that allow you to play windows games on a mac. If you don't want to look for/install those, there are a couple of playthroughs people have made of an earlier version of the game!

These both go through the earliest version of the game, which was missing a few added bits of story that are in the current version, but they still show the main storyline if you're interested in that! :)