Apple has extended its 2011 iMac hard drive replacement scheme, reports “Register Hardware” ( Originally pegged to all-in-one desktop maps purchased between May and July 2011, the program now runs from October 2009 to July 2011.

If you own a 21.5-inch or 27-inch iMac bought new during that period, you may qualify for a free hard drive replacement. At issue are a series of Seagate 1TB HDDs that Apple discovered may fail.