I uploaded “Friends for Life” on this site as Modded Games. The DLC folder patch is needed if you have the steam version of the game. Since you have a Mac I’m not sure the dlc folder patch .exe is compatible for you. My suggestion is to torrent Mafia II (Mac version) since you already have a legit copy of the game. If you torrent it, you can easily play “Friends for Life” without installing the “Dlc Folder Patch”.