iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
New CPUs, faster Wi-Fi, same flaws: Apple's 2013 iMac reviewed | Ars Technica
SOLVED: Need more ram for iMac 21.5 late 2013 - iMac Intel 21.5" EMC 2638 - iFixit
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
Why Not Apple Ram
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
Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
iMac 27" 2013 SSD upgrade - IT-Tech Online
macbook pro - Can I upgrade RAM on late 2013 retina Mac Book Pro? - Ask Different
iMac RAM Upgrade mixing different memory sticks: 27” iMac late 2013 - YouTube
How to Upgrade iMac RAM: 2012-2022: EveryMac.com
iMac 2013 Model Ram Upgrade - YouTube
Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
For These 20-Inch And 17-Inch Models
How To Upgrade RAM in a Mac | Macworld
2013 iMac teardowns reveal SSD slots, soldered-in CPU in the 21.5” model | Ars Technica
Can you upgrade the RAM in the 27-inch iMac? | iMore
Apple's new 'Assembled in USA' iMac a bear to upgrade, repair • The Register
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
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 at Amazon.com
Solid State Drives
A-Tech 32GB Kit (4x8GB) RAM for Apple iMac (Late 2012, Late 2013, Late 2014, Mid 2015) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
For These 24-Inch And 20-Inch Models
How to upgrade RAM iMac late 2013 21.5inch - break & fix MOVIE - YouTube