Maybe it's because I'm on macOS Monterey or I'm on the new MacBook Pro, but I just get the error
The application “Mac_64bits” can’t be opened.
Open the terminal and enter:
sudo chmod -R 755 /Users/jc/Mac_64bit.app
Drag and drop the game after the 755 and it will enter the path automatically. You'll then be able to open the app normally.
I'm on M1 macbookpro Monterey, it works perfectly fine
