Wow, boy I'm surprised to see this thread still open. I'm on Mac as well. Finished Episode 1 and then tried to download Ep2. The first time it slowed down after 68% or so, crawling down to 0.01% per second movement. Then, it stopped completely at 99.50%?!?!?!? Frustrating. I had to restart the game. All of those files that were just downloaded? Gone! Now, it's going at it again, but it's dead slow. My internet is fine.
I actually haven't been able to see a support email address on TTG website at all. what is it? I'll also complain to BBB.