Should I Upgrade My Mac to SSD? - Best Mac Optimization Software Reviews
Amazon.com: OWC 480GB Aura Pro 6G 3D NAND Flash SSD Upgrade Kit Compatible with iMac (Late 2012) : Electronics
iMac (21.5-inch, Late 2012) - Technical Specifications
OWC DIY Drive Upgrade/Install Kits for Apple iMac Models
Amazon.com: OWC 480GB Aura Pro 6G 3D NAND Flash SSD Upgrade Kit Compatible with iMac (Late 2012) : Electronics
Amazon.com: OWC 1.0TB SSD Drive Upgrade Kit: 1.0TB Mercury Extreme Pro 2.5" 6G SSD 7mm, Express 2.5" USB 3.0 Drive Enclosure, and 5 Piece Toolkit : Electronics
OWC DIY Drive Upgrade/Install Kits for Apple iMac Models
OWCDIDIM27SSD10, OWC Internal SSD DIY Kit, For All Apple 27" iMac 2010 Models, iMac to SSD SATA 3Gb/s data cable, iMac to SSD/HDD power "Y" cable, Thermal safe adhesive mounting set
SSD Upgrade Kits For 21.5 Inch iMac 2012 - 2013
How to Upgrade the Main Drive in a 21.5-inch iMac 2012-2015 (iMac13,1 iMac14,1 iMac14,4 iMac16,1) - YouTube
A list of successful iMac 27" (2012-2019) SSD upgrades | Page 39 | MacRumors Forums