How to Install Maps for Left 4 Dead 2 on Steam for mac

Step 1: Go to Finder

Step 2: Find the Real Application Support 

           Type in Shift+cmd+G or go to GO>GO TO FOLDER 

           Type in "~/Library/Application Support"

Step 3: Find the folder "Steam" inside that Folder (double click it)

Step 4: Find the folder "SteamApps" inside steam (double click it)

Step 5: Find the folder "common" inside steamapps (double click it)

Step 6: Find the folder "left 4 dead 2" inside common (double click it)

Step 7: Find the folder "left4dead2" inside left 4 dead 2 (double click it)

Step 8: Find the folder "addons" inside left4dead2 (double click it)

Step 9: Drag in the file. IT DOES NOT NEED TO LOOK LIKE STEAM IT CAN JUST LOOK LIKE A FILE! 

here is in video form if you need it. 

Here if you wanna see a map this one is cool is Left 4 Dead 2 mixed with Minecraft its so cool!!!!