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Two unreleased iMacs referenced in macOS Big Sur 11.3 beta | AppleInsider
macOS Big Sur: The MacStories Review - MacStories - Part 3
List of Macs Compatible With macOS Big Sur - MacRumors
21.5" Late 2015 iMac, 11.6 Big Sur OS, 8GB RAM and 1TB Storage | eBay
Apple iMac (Retina 4K, 21.5-inch, Late 2015) Silver, 8GB RAM, 512GB SSD MacOS Monterey (12) Used (Grade B) - One Bite Technology - St. Albert
Install macOS Big Sur on unsupported models - YouTube
iMac 21.5'' Late 2015
macOS Big Sur - Wikipedia
Apple Myth 15 - Do not install Big Sur on an Apple Fusion Drive system - ACE
Imac Late 2015 5K Retina 27 Inch Review Based On OS 11 Big Sur - YouTube
How to clean install macOS 11 Big Sur
Big Sur and now bricked iMac late-2015 | MacRumors Forums
Apple iMac Core 2 Duo 2.26 GHZ - 20" - macOS Big Sur - 2GB RAM - 128 GB SSD HD | eBay
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 iMac 21.5" Retina 4K Late 2015 Core i7 16GB 1TB SSD macOS Big Sur | eBay
Is Big Sur a Big Mistake for a 2015 MacBook Pro? | MacRumors Forums
macOS Monterey will drop support for older MacBook Pro and Air models
macOS Big Sur review: Entering the future of the Mac | Tom's Guide
macOS Big Sur: Features, release date, how to install the beta, and everything else you need to know | Macworld
MacOS Big Sur compatibility: Will your laptop work with the new OS? - CNET
How to Install MacOS Big Sur on a Mac | OSXDaily
Amazon.com: Late-2015 Apple iMac with 1.6GHz dual-core Intel Core i5 (21.5-Inch, 8GB RAM, 1TB)(Renewed) : Electronics