Lex Friedman for Macworld:

Apple has quietly extended its iMac 1TB Seagate Hard Drive Replacement Program through April 12, 2013. Last year, Apple acknowledged that certain Seagate drives in 21.5-inch and 27-inch iMacs could fail, for 1TB models sold between May 2011 and July 2011. Now, however, Apple is broadening the window of affected iMacs: Any 1TB iMacs sold between October 2009 and July 2011 could be affected, the company says.

If you’ve already paid for a hard drive replacement for an affected machine, you’re entitled to a refund. Visit Macworld for details.