Amazon.com: Apple 21.5" ME699LL/A (Early 2013) iMac Ultra Thin AIO Desktop, FHD IPS Display, Intel Core i3 3.3GHz, 4GB DDR3, 500GB SATA, macOS (Renewed) : Electronics
macOS 11.0 'Big Sur' will natively support all Macs from mid-2013 to current, dropping support for all pre-Retina MacBook Pros and the first gen Retinas. : r/mac
Apple 27-Inch iMac (Late 2013) Review, Haswell Inside | HotHardware
Amazon.com: 2013 Apple iMac with 3.2GHz Intel Core i5 (27-inch, 8GB 1TB Mac OS X) (Renewed) : Electronics
Apple iMac 27-Inch (2013) Review - SlashGear
SSD Upgrades for Apple iMac 27-Inch Late 2013 - 2019
Latest macOS compatibility chart : r/MacOS
MacOS Big Sur compatibility: Will your laptop work with the new OS? - CNET
iMac (21.5-inch, Mid 2011/Late 2011, A1311) - Dr. Macbook Thailand
What are the macOS Big Sur compatible Macs? - Quora
Configure your own 21.5-inch Apple iMac (2013) at OWC
What are the system requirements for macOS Catalina
iMac (21.5-inch, Late 2013) - Technical Specifications
macOS compatibility: What macOS versions can my Mac run? | Macworld
How to Install macOS Ventura or Sonoma on Unsupported Macs, for Security Improvements - The Mac Security Blog
How to Install macOS Catalina on an Unsupported Mac - MacRumors
macOS Catalina Compatible Macs and System Requirements: EveryMac.com
Here Are All the Macs Compatible With macOS Catalina - MacRumors
Running Monterey on a 10 year old iMac. Open core is a life saver. 😠: r/MacOS
Apple iMac 21.5" A1418 ME087LL/A 2013 Core i5 2.90GHz 8GB RAM 1TB HDD – Coretek Computers
Amazon.com: 2013 Apple iMac with 3.2GHz Intel Core i5 (27-inch, 8GB 1TB Mac OS X) (Renewed) : Electronics
Identify your iMac model - Apple Support
Apple 27-Inch iMac (Late 2013) Review, Haswell Inside | HotHardware
iMac (27-inch, Late 2013) - Technical Specifications
