Sorry for the repost of a topic that has been brought up a million times, but I am having a lot of trouble with my computer lately. I'm running on the Silver 2.4ghz MBP from Summer of '08. With any and all apps, especially FireFox, I get a lot of lag, so I've been seeing A LOT of beach ball. I did a bunch of cleans with Onyx, and that always fixes it for a while, but this problem has been pretty nagging. I am also running on Snow Leopard, have everything completely updated, and have around 57gb left on my HD. If I can't get any help here, I think I might have to be one of those people who go in to Apple store to get their computer fixed... my battery needs to be serviced anyway. Thanks for any help.