How to Upgrade iMac Hard Drive (2009, 2010, 2011): EveryMac.com
iMac 27 2012-2015 Hard Drive Replacement with SSD
OWC SSD Upgrade Kit for 2010 27-inch iMacs, OWC Mercury Electra 2.0TB 6G SSD, 18" SATA III 6Gbps Data Cable, SSD Power Cable, Installation Tools and iMac Screen Adhesive Tape Set : Electronics
iMac 2012 internal storage upgrade
iMac 2011 27" Apple stock SSD swap | MacRumors Forums