Mine still isn't working.
Mine isn't either. In my case, though, I think I may just have reached the limit of what my poor little MacBook, with its weak shared graphics, can handle. I don't know why I was able to run Sims3 plus Pets plus SN, but after doing a lot of research on this, it seems I shouldn't have been able to run all this!
I've had to bite the bullet and decide if I want to get a PC just for gaming, and I think that is the way I am going to have to go.
Doesn't answer why all my game saves seem to be problematic, nor does it help you, I'm afraid, but for me, I think the problem was simply not enough of a graphics card to handle what I was asking it to do.