I'm new to the macworld so please excuse my ignorance. I bought an brand new iMac late last year at my local apple store. I've been reading up about the 10.5.2 software updates. When I went to check what software version I had, it showed I had 10.4.11? I went to the apple website to upgrade to 10.5, but all I get is 10.5.1. Can someone help me upgrade to 10.5.2?