Hey there, sorry to hear youre having trouble with opening the game.
I sadly dont have a mac to test this on but i did some research and there are a couple of fixes for this error that you could try:
Check your security settings and or file permissions to see if its not being blocked by anything.
Maybe the file got corrupted somehow, so maybe redownload?
Lastly, maybe your OS needs to be updated?
Sorry if youve tried all of these already but i cant test these things myself :( maybe theres someone in our discord that has mac who can help with this issue!
Hope you get to play the game soon!!