Ok so I have two problems. First, I downloaded cod4 on my Mac and I do not have a folder. I am trying to mess around with mods for fun but I have to have a mod folder, which I don't have? I tried uninstalling the game and re-installing it but that didn't do anything. And I downloaded it on the apple store, if that helps. This is the main problem I need u to help me with. My other problem is that I get the serial key in use message when I try to join servers. And this is a legeit copy. I payed $50 for it. Please help me out with this, mainly the folder problem
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