Mac RAM Upgrade, Best iMac Memory Upgrade – Best Reviews
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
Install memory in an iMac - Apple Support
Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
Crucial 8GB DDR3L-1600 SODIMM Memory for Mac | CT8G3S160BM | Crucial.com
How to Install Memory iMac 27-inch 5K (RAM Crucial 16GB) - YouTube