Hi, Is your iMac EMC 2211 1225A model? I brought my iMac to repair to change my hard drive to Western Digital 2TB Green Hard drive with 6GB/s and technician said the hard drive is recognized by the computer while they were booting it. They have upgraded firmware to the newest version of 7.0 (?) but still iMac hasn't recognized the new 2TB hard drive. Do you know anything about this situation?