Bought this imac last November and have had various problems. The latest being the SuperDrive. For some while I have been having problems with the drive either not reading/writing to CD,grumbling,grinds,buzzing and rattling, can sometimes insert a disk but the drive does not see it and asks for a disk to be inserted. So I took it to my local Apple authorized repairer, been in since Tuesday and got it back today. New optical drive fitted but exactly the same problems, have got to take it back again next week for further investigation. More inconvenience. Should add this is using Disk Utility to append data to an existing disk or starting a new disk What do you guys think about it, anyone else had the same problem.