Amazon.com: OWC SSD Upgrade Kit for 2011 21.5-inch iMacs, Mercury Electra 1.0TB 6G SSD, 18" SATA III 6Gbps Data Cable, Installation Tools and iMac Screen Adhesive Tape Set : Electronics
New 2TB SSD in the iMac! Upgrade kit from OWC is awesome! : r/mac
OWCDIYIM21SSD11, OWC Internal SSD DIY Kit, for All Apple 21.5" iMac 2011 Models | EET
2011 iMac SSD Upgrade with Thermal Sensor w/ resetting NVRAM Tutorial no steps skipped - YouTube
Upgrading Apple iMac 2011 27 Hard Drive to SSD, Huge Improvement - YouTube
Internal SSD DIY Kit for Apple 21.5-Inch iMac 2011