I am in the market for a Mac, and I borrowed my friends 1.0 Ghz PB to test it out over the weekend. He has 512MB ram. Although the machine didn't crash, I found many times (3-4x this weekend) when I would get that multi-color ball that would spin FOREVER until I shut the machine down by rebooting. I am a little discouraged, because I have heard that Macs don't crash, but geez, I know it didn't crash, but it just HUNG.... Is this common? I am getting a little nervous about switching because of this. The "hangs" came when I was playing music, playing with imovie, or playing movies. Would more ram prevent this? It also happened when opening up powerpoint files. Those were the 4 separate times. My friend says that this is not a "crash" and I could go to the apple store and this would happen, and he said that the beachball thing was part of life with a mac.... I find this a little frustrating. Let me know, please.