If you have a xxxx.Civ5Mod file use something like Ez7z to expand the file which will create a folder that you can then put in your MODS folder which should be similar to this: (Depending on which version of Civil you have) Some mods work and some do not, it seems rather hit or miss. This should re-enable the Mods button on the Main Menu. To comment it out simply add two hyphens like this: ~/Library/Application Support/Steam/SteamApps/common/sid meier's civilization v/assets/UI/FrontEnd/a To re-enable this button you will need to navigate to the a file, open it with a text editor (like TextWrangler) and comment out line 33. The Mods button is disabled in the a file.
