Wow! after all these videos i came across this one worked for me! This is for all MAC USERS at least. Guys make sure when you download gzdoom that you put the Docs folder into your doom folder with your wad. That docs folder is very important, its the license. Also you will NOT click on the gzdoom blue app. you will open the game with the greyed out gzdoom icon. 🙂 i hope this helps everyone.