Apple has launched a repair extension program for certain 21.5-inch and 27-inch iMacs. The models — which shipped to customers between May 2011 and July 2011 — are prone to the failure of their internal 1TB Seagate hard drives.
Apple will replace these drives free of charge via the Genius Bar Apple-Authorized Service Providers.
The company is in the process of contacting customers affected by this issue via email. In the mean time, to see if your system is covered under this program, visit Apple’s support webpage.
Update: Here’s a screen shot sent in by a reader. This memo went out to AASPs today, declaring the problem to be limited to a “very small number” of iMacs: