Hey, thanks for reaching out. I don't have a mac, but I have a friend who has one - he says that he used a program called "The Unarchiver" (I believe this is it: https://theunarchiver.com) to extract the files and it ran after that. I'm not entirely familiar with mac, so I'm sorry if that still doesn't work :(
EDIT: Updated the game page with info about this, lmk if it works for you :)