Hi, I have an iMac that is roughly 3.5 yrs old. It is running OS 10.5.8. I have tried twice to upgrade it to 10.6.3 (eventually I would like to have it fully up to date), and it appears to go through the whole install process, but when I check the OS after the install it still says Version 10.5.8. I called Apple and they said to take it into the genius bar because they had never heard of this problem, but I would like to avoid that since it will cost me. Please help!! Thanks.