I'm planning to upgrade my iMac 27 for SSD (intel x25-v). and I asked apple authorized service center and they answered like this, ====================================================== If it is installed by a certified technician, the warranty will be unaffected, other than the fact that the customer's hard drive is not covered. We would need to make sure it is a 3.5" Hard Drive and not a 2.5" notebook sized hard drive because even though the connector is the same, different amounts of power are given to each, and the part that holds the drive in place inside the iMac will only fit a 3.5" desktop sized drive. Costs: $85.00 to install the SSD $85.00 to transfer the data from the old drive to the new Hope this helps, ====================================================== Is this true?? and please check which bracket will work... http://www.canadacomputers.com/index.php?do=ShowProduct&cmd=pd&pid=026794&cid=CAS.688 http://www.canadacomputers.com/index.php?do=ShowProduct&cmd=pd&pid=024326&cid=CAS.688 and I think they haven't done this upgrade before... also wonder if they know the temperature sensor things... thank you very much.