iMac Late 2013 21.5 SSD Upgrade - YouTube
2013 iMac teardowns reveal SSD slots, soldered-in CPU in the 21.5” model | Ars Technica
The Display - 21.5-inch iMac (Late 2013) Review: Iris Pro Driving an Accurate Display
21.5 inch late 2013 iMac - RAM upgrade - Apple Community
Apple Classifies Early 2013 21.5-inch iMac as Obsolete - MacRumors
Apple iMac 2013 (Late) 21.5-inch (iMac 14,3) SSD ,Ram & OSX Upgrades - ZD Laptop Service Centre
Upgrading RAM On The New 27-inch iMac Is Easy, Here's How | Cult of Mac
iMac Intel 21.5" EMC 2638 RAM Replacement - iFixit Repair Guide
Apple iMac 21.5-inch 2.7GHz Quad-core i5 (Late 2013) | mac of all trades
iMac Intel 21.5" EMC 2638 RAM Replacement - iFixit Repair Guide
Apple iMac (21.5-inch, late 2013)2.7GHz Quad-core Intel Core i5 8GB RAM 1TB HDD | eBay
Apple Officially Confirms 21.5” iMac RAM Is Non-User-Replaceable
Teardown of new 21.5-inch iMac surprisingly reveals user-upgradable RAM, modular CPU - 9to5Mac
A-Tech 32GB Kit (4x8GB) RAM for Apple iMac (Late 2012, Late 2013, Late 2014, Mid 2015) | DDR3 1600MHz SODIMM PC3-12800 204-Pin SO-DIMM Max Memory Upgrade at Amazon.com
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
CMS 16GB (2X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core I5 3.4 27-Inch (Late 2013) Me089Ll/A - A7
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
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
iMac Intel 21.5" EMC 2638 RAM Replacement - iFixit Repair Guide
16GB KIT 2X 8GB for Apple iMac 2.7GHz 21.5" Late 2013 2.93GHz 27" Late
Apple 21-inch iMac, late 2013 review | TechRadar
