Wait were you able to run chapter 2 on your mac?
Viewing post in Bug reports - report the bugs and glitches you encounter here.
Sorry !
I just saw your message just now ! So I didn't even finish the chapter 1 because some parts of the chapter were going so slow. So I just saved my game for later when I'll have the courage to play this slow parts. But I think I would be able to play the chapter two as well. I'll come back to you if I have any other news.