4GB iMac Memory for 27-inch Late 2012 to Mid 2015 Models 13,2 14,2 and 15,1
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 iMac 14:1 A1418 i5-4570R 8GB RAM 1TB HDD Mojave 21.5" Grade B 1033314 | eBay
Refurbished Apple iMac 14,1/i5-4570S/16GB Ram/1TB HDD/21.5"/A (Late 2013) | SafepcDirect
Upgrade RAM Apple iMac 21.5 slim A1418
Upgrade RAM Apple iMac 21.5 slim A1418
16GB -2x8GB Memory Ram Upgrade 21.5" Apple iMac-14.1 Core i5 2.7GHz Late 2013 | eBay
iMac Upgrade Guide for Intel iMacs
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
iMac Memory RAM - Macfixit Australia
Installare la memoria in un iMac - Supporto Apple (IT)
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac