I was an early adaptor of Snow Leopard, and it was everything you wanted. Fast, effecient and all the hot stuff. But through all the software updates, I´ve experienced that the OS has become gradually slower and slower. Programs takes longer to load, Safari crashes ALOT more than before. Running several programs takes alot more effort for the machine. Even the startup takes longer! I find this strange, as I have no viruses, and have used the Macbook (2008) quite in a mature way. I have 50gb free space on the hard drive. I make sure to delete programs and files not in use. I have almost no icons on the desktop, I´ve run disk repairs, clean ups and all that hardware healthcare you can mention. Is it time for a hard disc formatting? I´ve never done in on Mac, and don´t see the need either, because I really can´t find a logical reason for the slowness. Other than Apple may be ****ing up the OS with their updates, to make customers feel that suddenly their machine is slow, and could use an upgrade (Lion this time), which is praised as faster and more effecient than its predecessor every time.