Apple iMac 21.5-inch and 27-inch (Late 2013) reviews | Macworld
Amazon.com: Apple iMac 21.5in 2.7GHz Core i5 (ME086LL/A) All In One Desktop, 8GB Memory, 256GB Solid State Drive, MacOS 10.12 Sierra (Renewed) : Electronics
APPLE iMAC i7 21.5" Late 2013 16 GB RAM 1TB HDD 128 GB SSD 3.1 GHZ NVIDIA GT | eBay
SOLVED: Need more ram for iMac 21.5 late 2013 - iMac Intel 21.5" EMC 2638 - iFixit
New CPUs, faster Wi-Fi, same flaws: Apple's 2013 iMac reviewed | Ars Technica
iMac Late 2013 Upgrade in 2020 CPU Ssd Ram MAX Out ... Worth it? | Shades Of Tech ⬡ - YouTube