macOS Big Sur "You do not have permission to open blah-blah-blah" FIX:
After you unpack the game and run into "You do not have permission to open".
1. Open Terminal, enter "chmod -R 755 ", do not forget the space at the end, it's there for a reason.
2. Drag and drop the .app file in there.
3. Press return.
After that go ahead and run the game. You can do it with any other apps that behave the same, btw.
If you are interested as to what it does – chmod manages file permissions in most Unix systems, when Mac prohibits you from reading, viewing or opening a file – this command overrides it. -R is a historical artifact, while 755 means only you can write in the directory, while other profiles can't.