Hi guys, I've got a 2010 unibody Macbookpro 13".Yesterday I changed it's 250GB-5600rpm internal hard drive with a 500 GB-7200rpm one..I believe I installed everything right like I've watched from youtube before, I did everthing same like on this link, http://www.youtube.com/watch?v=JoHNcjCyAvU&feature=related After mounting the hard drive into MBP and installing snow leopard on it, I've realized that MBP fan is running with no stop!It's always running without a breathe! Even my system was installed perfect and hard drive is brand new! I've searched on web and I'm suspicious about 2 things. 1)SMC 2)Thermal sensor Did anybody come up against this issue?If yes, how can I solve it ?? Waiting for your helpful answers..