Ok my first post here. I got a 24 inch Imac 2.8 GHZ Core 2 duo, with 4 GB of ram I should be fine right? well wrong! I got tired of my mac being stuffed so I did a complete clean reinstall (leopard) and formatted the HDD. Well that did not do much, still slow and I am seeing to many rainbow circles, between switching programs, even browsing is slow. Tried the 17 things (chriswrites.com) to speed up your mac (most we renot necessary since I formatted) updated all software repaired the disk permission Still no luck...... I am lost.......what to do???