NEMIX RAM 16GB Kit (2x8GB Upgrade) DDR3-1600 SODIMM PC3-12800 for Apple MacBook Pro Mid 2012 / iMac Late 2012 / iMac 2013, Late 2014, Mid 2015, Mac Mini Late 2012 at Amazon.com
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
Install memory in an iMac - Apple Support
iMac with Retina 5K Display 2014/2015 Memory Upgrades
iMac with Retina 5K Display 2014/2015 Memory Upgrades
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Apple iMac 2014 (Mid) Core i5 1.4Ghz 21.5-inch 14,4 SSD & macOS X Upgrades - ZD Laptop Service Centre
Apple iMac 21.5" - Mid 2014 Reviews, Pros and Cons | TechSpot
iMac Retina 5K: Memory upgrade (RAM)
Adamanta 16GB (2x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini at Amazon.com
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
8GB (2 x 4GB kit) OEM RAM Memory for Apple iMac Retina 5K 27 inch (Late 2014) Core i5 / i7 PC3-12800 DDR3-1600MHz 204-Pin SoDimm
Memory in New $1099 iMac is Soldered and Not Upgradable - MacRumors
Timetec 32GB KIT(4x8GB) Compatible for Apple DDR3L 1600MHz PC3L-12800 CL11 for iMac (Mid 2011, Late 2012, Late 2013, Late 2014 Retina 5K, Mid 2015 Retina 5K) SODIMM Memory Module MAC RAM Upgrade at Amazon.com