When I fired up The Walking Dead Season 1, which I've bought on Steam, I noticed it didn't start. The game application's icon showed up on my iMac, but the game's window never appeared. I killed the game and restarted it. Again it didn't start. Again killed it and tried a third time. Then it did start normally, but it had forgotten all progress I made! All profiles were empy and I had to start over from the beginning!
I look into this problem and it appears a lot of people are having troubles with this game. How awkward. Anyway, I looked at the save game directory and it did still contain many of my saved games. But somehow the game itself doesn't seem to detect them.
I've ran the support tool. You can download the file here: http://we.tl/LNPboIQNT7
Notice it lists some of the TWD files in my .trash folder. You can ignore that. It's just a copy I made of the files and decided to delete that copy before running the tool.