21.5" iMac Has No User-Upgradable RAM; 27" Has Four Accessible RAM Slots - MacRumors
iFixit iMac teardown reveals dual mics, difficult RAM upgrades and glued LCD - 9to5Mac
Install memory in an iMac - Apple Support
2012 21.5-Inch Apple iMac Review: Slim, Sleek, And Stylish, But Far From Shallow | TechCrunch
Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Mac Book Pro(Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM at Amazon.com
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
How To Upgrade RAM in a Mac | Macworld
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
Apple iMac 21.5" 2012, Intel Core i5 @ 2.7GHz (1TB HDD 8GB RAM) All-In – KenDoTronics
Install memory in an iMac - Apple Support
The Case of the Late-2012 iMacs - MacStories
Review: 21.5-inch 2012 iMac takes two steps forward, one step back | Ars Technica
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
Apple's 27" iMac Late 2012 model. How to upgrade the ram to 16GB - YouTube
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
Install memory in an iMac - Apple Support
iMac RAM for Model 13.2 to 15.1| DDR3-1600MHz | 8GBx4 | MacMemory.com
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Apple's 2012 iMac: Ready for its close-up (pictures) - CNET
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
Apple iMac 13,1 A1418 2012 Intel Core i5 3330S 2.70GHZ 8GB RAM NO Screen/HDD/OS | eBay
![Apple 21.5" iMac Late 2012 - Catalina, 1TB HDD, Intel i5 2.9GHz, 8GB RAM | eBay](https://i.ebayimg.com/images/g/OL8AAOSw-xlkHHWX/s-l1600.jpg "Apple 21.5" iMac Late 2012 - Catalina, 1TB HDD, Intel i5 2.9GHz, 8GB RAM | eBay")
Apple 21.5" iMac Late 2012 - Catalina, 1TB HDD, Intel i5 2.9GHz, 8GB RAM | eBay
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
