first time Mac owner. I have a MacBook and so far I love it. However I use AIM for chatting and the other day it started locking up on me whenever I would click off the AIMmail window that shows up right after sign on. and then it progressed to AIM not working at all. I removed AIM from the MacBook(i think) but now when I download the AIM app for mac my computer tells me I cant open a .bin file but it would when I originally downloaded AIM and as far as I know I haven't had any problem downloading .bin files before. I know about iChat but I like AIM better because its more familiar. Please bear in mind this is my first Mac. so what do I do??