iMac Late 2013 27" 32GB Ram Upgrade | MacRumors Forums
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Apple iMac 21.5-Inch Core i5 (Late 2013) All in One Desktop PC - Core i5 (I5-4570R) 2.7GHz - 8GB RAM - 1 TB HDD - Intel Iris Pro 5200 1536MB Graphics - Full HD Display - macOS High Sierra