To play Renpy in Mac, download Mac version of Renpy player from internet (the version needs to match the game files you have, for this one it's Renpy 8.5.0 which I think is the latest). Then open this game's zip file on your Mac (Windows or Linux version), look inside by right-clicking on game...
Great stuff @Fap-e-Nator. I was able to download the Renpy files. And I can confirm they work on a Mac computer (I can explain how to make that work if people don’t know).