Apple establishes iMac (27-inch) 3TB hard drive replacement program

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 or an Apple Authorized Service Provider (AASP) will replace affected hard drives free of charge.

Apple

Apple will be contacting owners, but you can enter the serial number of your iMac at the above link to see if it qualifies under the program.