Issue playing episodes 2, 3 ,4 and 5

I bought the game "The Walking Dead" last year and I played all episodes. Once I finished the game I tried to play It again but It crashed everytime I tried to pass from ep 1 to ep 2. The screen just stays in black.

Recently I bought 400 days, and I can play It but with aleatory stories only.

I'm using a mac with OSX 10.8.4. Does anybody knows how to fix this? or had the same problem?
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