I have a 2GHZ Powermac G5 that i bought about 5 months ago. I have absolutely no problems with it at all, but i'd still like to buy the extended warrenty. Someone told me that if i want to buy the extented AppleCare Warrenty i have to do it within the first 6 months, and if you purchase it too late, they won't let you use it. Is this true???