If you bought an iMac ^[1] with a 1TB Seagate hard drive between May 2011 and July 2011, your computer may be part of a recall aimed at replacing the hard drive, which “may fail under certain conditions.” (Apple failed to specify what, exactly, those conditions might be.)

The affected machines seem to be those that were updated in early May with Thunderbolt compatibility, FaceTime HD, and quad-core i5 and i7 processors; to see if yours is one of the machines covered by the recall, you can enter the serial number at Apple’s website here ^[2].

The expiration date for the free hard drive replacement is July 23, 2012. Customers can bring their machines, as well as their original OS installation disks (so the replacement drive has an operating system) into any Apple Retail Store or Authorized Service Provider for the swap.

Read more at Ars Technica ^[3].