If you download the mac launcher from this page:
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you can use it to play the PC version (and the PC version of most renpy games). All you have to do is place the folder containing the game in the renpy application folder, open the renpy launcher app, and then you should be able to select the game from the list. I'm sure there's a thread on the forum that provides more detailed instructions too if needed.
EDIT: It's here
https://f95zone.to/threads/how-to-create-a-mac-version-of-any-renpy-game.3289/.
But in my experience, you don't usually need to do what this suggests (eg make a new folder). Usually you can just unzip the download and put it in the folder containing the renpy app, as I described.