Apple revises iMac line, adds 21.5″ Retina 4K model – Six Colors
Apple 2017 5K iMac 27-inch review: The screen sucks you right in | Mashable
Review: The 2019 21.5-inch iMac 4K is iterative, not transformative | AppleInsider
Apple iMac with 4K Retina display (21.5-inch, 2015) review: Apple packs more pixels into its smallest iMac - CNET
Apple iMac 21.5" Desktop with 4K Retina Display, 3.0GHz, MNDY2LL/A - (June, 2017) for sale online | eBay
Apple 21.5" FHD All-in-One Computer, Intel Core i5-4570R, 8GB RAM, 1TB HD, Mac OS, Silver, ME086LL/A (Refurbished) - Walmart.com
21.5-inch 4K iMac vs. 27-inch 5K iMac: Which Retina desktop should you get? | iMore
21.5-inch iMac 4K vs 27-inch iMac 5K: Which should you buy? | iMore
Apple 27-inch iMac review | CNN Underscored
Apple iMac (27-inch, 2019) | TechRadar
iMac (Retina 4K, 21.5-inch, 2017) - Technical Specifications
Compared: 2020 27-inch iMac vs 2019 iMac 5K | AppleInsider
Apple iMac 21.5 review: The iMac for everybody - Pocket-lint
Apple iMac 21.5-Inch With 4K Retina Display (2017) Review | PCMag
Apple cuts another Intel tie by discontinuing 21.5-inch iMac | Ars Technica
21.5-inch iMac | Release Dates, Features, Specs, Prices
A First Look At The 2012 21.5-inch iMac, And How It Compares To Generations Past | TechCrunch
Identify your iMac model - Apple Support
21.5-inch 4K iMac vs. 27-inch 5K iMac: Which Retina desktop should you get? | iMore
What are all the differences between the education-only "Late 2011" Aluminum iMac and the regular "Mid-2011" Aluminum iMac models?: EveryMac.com
Custom Built 21.5-inch iMac with Intel Core i9 Outperforms 24-inch M1 iMac in Tests - MacRumors
iMac (Retina 4K, 21.5-inch, 2019) - Technical Specifications
Apple launches new Retina 4K 21.5-inch iMac, all 27-inch iMacs now feature Retina 5K displays - 9to5Mac
Apple 21.5in iMac with Retina 4K display (2017) review | Stuff
Apple iMac - 21.5" Retina 4K Display, 3.0GHz 6-Core i5 | Sweetwater
Apple iMac 27-inch Review (2019): Full Review and Benchmarks | Tom's Guide
