Teardown of new 21.5-inch iMac surprisingly reveals user-upgradable RAM, modular CPU - 9to5Mac
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
late 2013 imac proccesor upgrade help | MacRumors Forums
Late 2013 iMac review: Faster than before, but the gains over previous models are modest | Macworld
Apple iMac 21.5" A1418 Late 2013 i5-4570R 2.7GHz Iris Pro Logic Board 820-3588-A | eBay
What Does It Take To Upgrade a 2012 iMac 21.5"?
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
usa-angel.com. Apple iMac 21.5" Core i5 2.7GHz 8GB RAM 1TB Desktop ME086LL/A Late 2013
How To Upgrade RAM on the Apple iMac 2012 - 2013 RAM Upgrade - 21.5 inch model - YouTube
16GB -2x8GB Memory Ram Upgrade 21.5" Apple iMac-14.1 Core i5 2.7GHz Late 2013 | eBay
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
OWC SSD Upgrade Kits for 21.5-Inch iMac (2013 - 2019)
How to Upgrade/Install Memory in a 21.5-inch iMac (Mid 2017) iMac18,1 iMac18,2 - YouTube
Best Buy: Pre-Owned Apple iMac 21.5-inch Desktop "Core i5" 2.9 (Late 2013) 8GB Memory 1TB HDD ME087LL/A
21.5 inch late 2013 iMac - RAM upgrade - Apple Community
A-Tech 8GB RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
21.5" Inch iMac Late 2013 A1418 RAM PCIe NVMe SSD Hard Drive Upgrade PSU Logicboard Replacement - YouTube
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
iMac Late 2013 21.5 SSD Upgrade - YouTube
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
Install memory in an iMac - Apple Support
iMac Intel 21.5" A1418 and A2116 (2012-2019) Adhesive Strips