Hi! Currently I don't have access to a 64-bit Mac to compile on (and don't know when I will...) but once I do I will add support for it. Thanks for your comment!
Hey!
I just bought the game hoping to play it later, because I only have 64-bit mac myself.
I'm running Big Sur 11.4, trying to run the downloaded app still gives me "the package is damaged" message.
BUT, when running from within the itch.io app, game works perfectly. I played for about 10 minutes to test things out and everything seems fine.