SSD Upgrades for Apple iMac 27-Inch Late 2013 - 2019
Install memory in an iMac - Apple Support
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
Apple's new 'Assembled in USA' iMac a bear to upgrade, repair • The Register
Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
8GB -2x4GB Memory Ram Upgrade for 27" Apple iMac-14.2 Core i7 3.5GHz Late 2013 | eBay
16GB (2x8GB) RAM Memory Upgrade For Apple iMac 27'' A1419 Late 2012 2013 | eBay
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
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
hardware - Can I add different size RAMs to iMac 5K? - Ask Different
How to UPGRADE RAM in the (Mid 2017) 5K iMac & save $$$! - YouTube