How to Upgrade iMac Hard Drive (2009, 2010, 2011): EveryMac.com
2011 imac 27" 32GB - final stage of 1TB + 2TB SSD upgrade (replaced HDD & optic drive). Also cleaned out the fans and case. Running 'SSD Fan Control' & 'Macs Fan
Optical Bay Hard Drive or SSD Mounting Solution for iMac
How to Install a 2.5-inch SSD in the SSD Drive Bay of a 21.5-inch iMac (Mid 2011) iMac12,1 - YouTube
2011 27" iMac SSD upgrade + fan speed - Whats the current consensus? | MacRumors Forums
Amazon.com: OWC SSD Upgrade Kit for 2011 21.5-inch iMacs, Mercury Electra 250GB 6G SSD, 18" SATA III 6Gbps Data Cable, Installation Tools and iMac Screen Adhesive Tape Set : Electronics
Install SSD iMac 2011 - How-To DIY Guide Tutorial
Replace your 2009-2012 MacBook Pro HD with an SSD
OWC Internal SSD DIY Kit for Apple iMac 21.5" OWCDIDIM21SSD11