Hi, sorry for the inconvenience. Did you download the right version (x32 or x64)? Also Mac may identify the game as being from an unidentified developer, in which case you'll have to go to system preferences and allow Mac to open apps from unidentified developers. Apparently there are multiple ways to do it, some more detailed instructions here:https://support.apple.com/guide/mac-help/open-a-mac-app-from-an-unidentified-dev...
I don't personally own a Mac so it may be hard to pin point what it is.