The Walking Dead for Mac Keyboard Issue

I just bought The Walking Dead for my Macbook Pro Retina 13" on steam and have been trying to play it. However, the game won't recognize any keyboard input. I can't move Lee using the WASD keys, and most importantly I can't pass any of the Q-mashing quicktime events! Is this a bug that hasn't been fixed yet, or is it a problem with my Macbook? Please help!
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