hi, i need help. i have looked al over and still am lost. I have a 24 inch white imac. duo core 2 intel 2.16gig 250 gig hd. running 10.6.8' i purchased a 2 tb hd seagate , i believe it is a 6 satadrive. i am using a jumper to bring down to 1.5 g speed.....if i even need to. bought a usb adapter and hooked it up to my mac and reformated and used superduper and ccc to make an exact copy of my hd in unit. i then booted into the drive and it worked fine. BUT if i put it inside my imac and try it ...I get a folder with a question mark. I tred to put in a os disk 10.6.4 and it said it could not load on my system. but it did let me check my drive. I was able to see the 2 tb drive and verify it and check for errors. but could not load a os onto my system... could have been the wrong one though. I do not have original disks. ANY HELP WOULD BE AWESOME. I know people have done this but I cant get it to work. Is it the wrong drive, is it to big, am i forgetting something? HELP PLEASE thank you in advance. by the way, I am getting very good at changing the drive in and out.