Apple has kicked off a replacement program for defective 3TB hard drives shipped with certain 27-inch iMac desktop computers.
The affected 27-inch iMacs were old were sold between December 2012 and September 2013. Apple has contacted affected iMac owners who provided a valid email address during the product registration process to inform them about this program. Owners who believe they have a 3TB hard drive but have not been contacted can use their serial number to check whether their system is affected.
Apple claims that the hard drives "may fail under certain conditions."
The 3TB drive was available as an optional extra for the 27-inch iMac and did not ship with any of the entry-level iMacs.
Hard drive replacements can be carried out through Apple or an Apple Authorized Service Provider (AASP). Users who paid for an out-of-warranty replacement will be entitled to a refund.
The program covers affected iMac models until December 19, 2015 or three years from its original date of sale, whichever provides the longest coverage.