Apple has announced a replacement program for 3TB hard drives in 27-inch iMacs purchased between December of 2012 and September of 2013
Apple has determined that a very small number of 3TB hard drives used in 27-inch iMac systems, may fail under certain conditions. These systems were sold between December 2012 and September 2013.Apple 2012 and 2013 iMac (27-inch) 3TB Hard Drive Replacement Program
Apple or an Apple Authorized Service Provider (AASP) will replace affected hard drives free of charge.
Apple is contacting affected iMac owners who provided a valid email address during the product registration process to let them know about this program. If you have not been contacted, but think you have a 3TB hard drive, you can enter your serial number below to see if it's part of this program.
