Sorry to hear that the simple solutions aren't working.
As I've said in other threads, I was the only mac user in the beta who had any notable problems, and my game has been quite stable for some time now.
One of the things I did during the beta was to completely erase everything OOTP from my computer and do a completely fresh re-install. However, in order to do that you have to be sure you get the hidden files. The user preferences and the config files are hidden, for example. If you aren't sure how to find the hidden files on your Mac (they are located relatively near to your game folder) post and I'll see if I can help you out -- it's certainly possible that one of those hidden files is the source of the problem.
Not sure why these things are happening on some Macs, but take heart -- there are certainly at least as many Windows users who are having similar problems. But apparently the overwhelming majority of users, but PC and Mac seem to getting by OK.
