Well, in Unity, in the build settings window, you choose the normal standalone but also you need to select macOS and build out a macOS app separately.  You'll need to first download the mac build support files.  You can do that in the Hub.  Unity Hub > Installs > Choose the specific editor version you used for this game > 3 dots in upper right corner of that install > select to add mac build support.  Then back in the Unity editor > build settings window > select macOS.  May have to actually have a mac to build for mac.  Macs can build for mac, windows, linux but I'm actually not sure if the Windows Unity client can build for Mac.  Apple might have some weird restrictions on that.