I have a base-model MacBook (the latest one with the Santa Rosa chipset), and over the past couple of weeks, I found that the overall performance is quite slower. For example, in the first month of owning my MacBook, the boot up time was 35 seconds. Now, it is 54 seconds! Also, when I clicked on Safari, the beachball came up just to load up my start page (which is macrumors). On that topic, I'm finding that the beachball is coming up a lot more often than it did before. What's happening to my MacBook? Why is it performing slower than it did before? It shouldn't be because of a virus, because Macs are virus-free, right? I just upgraded it to 10.5.2 and upgraded the Leopard graphics, and it didn't help the performance at all- it is still slow. Is anyone else's MacBooks performing slower? What can I do to make it faster? Thanks for your help .