Timetec 16GB KIT(2x8GB) Compatible for Apple 2017 iMac (27-inch w/Retina 5K, 21.5-inch w/Retina 4K / Non-Retina 4K) DDR4 2400MHz PC4-19200 SODIMM MAC RAM Upgrade for iMac 18,1 / iMac 18,2 / iMac
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
Apple iMac Late 2017 Price in Pakistan – Used All-in-One Core i5 8 GB RAM 1 TB HDD 2 GB Graphics Card Silver 21.5″ 4K Display and 15 Days Check Warranty - IT International
Buy Apple iMac A1419 27" PC Intel i5-4570 3.20GHz Processor 32GB RAM 1TB HDD + 128GB SSD OS X 10.15 Catalina at Morgan Computers
Install memory in an iMac - Apple Support
How to Upgrade iMac RAM: 2012-2022: EveryMac.com
How to upgrade iMac 21.5-inch (A1418) RAM and HDD to SSD - YouTube
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013