I was running Leopard 10.5.8 and my iMac 2.4GHz w/1GB Ram seemed to be getting slow. I upgraded to Snow Leopard. Without much running (Mail, Safari, iCal) it is very slow. At times, the free space has gotten down to 2.5MB in Activity Monitor. Nothing extraordinary seems to running when I open Activity Monitor. When I was trying to sync my iCal with MobileMe it really crawled. I did a PRAM reset, ran Repair Disk with install disk and Disk Warrior without any errors. Any suggestions on what I can do to improve performance will be welcomed. Thanks!