Close to maxing out your 500GB to 1.0TB factory-installed hard drive? With the OWC Internal HDD DIY Kit you can replace your old hard drive on your own with up to a 4.0TB drive (sold separately) for up to 8x more storage and backup capacity! And if you already have all the tools necessary to perform the upgrade, you can simply purchase the cable and mounting set separately here. The kits are certified to successfully pass the Apple Hardware Test.

Before attempting to perform this installation, please watch the instructional video in its entirety to determine your ability to perform this complex procedure. OWC assumes no responsibility for damage that may occur during the install. Technical support for this DIY product consists only of the installation video.

While OWC encourages the DIY philosophy, this is a very difficult install that requires advanced skills. If, after watching the how-to video, you are not fully confident of your ability to add a drive to your 2011 27-inch iMac, you can choose to have OWC "Do It For You" via our Turnkey Upgrade Installation Program.