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Try right click > open or run it from the itchio app, apple does not want you to play games outside of their app store

this is a common issue on mac when it comes to unity games :( the way i got it to work was by clicking "Show Package Contents" on the app, navigating to "Contents > MacOS > Meet Me at The Worker's Club", then opening a terminal session and typing:

chmod +x {path_of_file_in_MacOS}

then all you have to do is right click > Open on the app.