Originally posted by -hg- | sharp_shooter:For those that come here and are wondering how to fix this problem I have the solution. First off the problem is only present on Mac users like myself. Second off you need to go to library/application support/steam/steam apps/common/left 4 dead 2/left4dead2/addonsIn the addons folder you will see a folder called "workshop" this is where all your subscribed addons go when you subscribe to them on the workshop. You are going to copy everything in the folder and past all of that to the addons folder. So basically for the mods to work they need to be in the addons folder not the subfolder workshop inside of addons.