I've had my Macbook 2.4GHz with 4gb of ram 500gb HD last Monday, and I seem to have spinning beach balls quite often. My computer is completely clean with NO software but the ones that come with OSX. I've updated all of the software updates that are available to my laptop. I get spinning beach balls when I click on a song in iTunes, I get them when I'm going to a previous page in Safari. It's not every time but the times that it has happened that's what was going on. Most of the time it will just sit there and spin and never go away. I don't know what to do [because I'm new to Mac's] and the only thing I been able to do is press and hold the power button to restart the laptop. What do you think might be going on?