Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
iMac | 3.2 GHz Core i5 | 27 Inch | Late 2013 - Techable.com
OWC 32GB (2 x 16GB) PC21300 DDR4 2666MHz SO-DIMMs Memory, Compatible with Mac Mini 2018, iMac 2019 and up, and Compatible PCs, (OWC2666DDR4S32P) at Amazon.com
27 inch iMac with Retina 5k Display 2019 3.7GHz i5 2TB Fusion Drive 16GB RAM | Refurbished | Techable
Late 2013 iMac review: Faster than before, but the gains over previous models are modest | Macworld
Mac RAM Upgrade, Best iMac Memory Upgrade – Best Reviews
Install memory in an iMac - Apple Support
SSD Upgrades for Apple iMac 27-Inch Late 2013 - 2019
Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
A-Tech 16GB Kit (2x8GB) 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
iMac Late 2013 Upgrade in 2020 CPU Ssd Ram MAX Out ... Worth it? | Shades Of Tech ⬡ - YouTube
iMac (27-inch, Late 2013) - Technical Specifications
Apple Posts iMac (Late 2013) Memory Specifications
Apple iMac 21.5-inch and 27-inch (Late 2013) reviews | Macworld
iMac 27-Inch "Core i7" 3.5 Late 2013 Max RAM is higher than 32gb | MacRumors Forums
Configure your own 27-inch Apple iMac (2013) at OWC
iMac (27-inch, Late 2013) - Technical Specifications
How to Upgrade Memory in a 27-inch iMac (Late 2012-2013) iMac13,2 and iMac14,2 - YouTube