How to Install macOS High Sierra - iFixit Repair Guide
Apple iMac 21.5-inch Late 2009 3.06GHz Intel Core 2 Duo (MB950LL/A) – UNICOM, Inc.
Identify your iMac model - Apple Support
Used: IMac (27-inch, Late 2009, 2.66 GHz, 4 GB, 500 GB) | Mac-Ave
MacOS High Sierra Compatible Macs List | OSXDaily
iMac (Early 2009) | Low End Mac
Apple iMac 3.06GHz Core 2 Duo 4GB DDR3 500GB HDD High Sierra NVIDIA GeForce 9400 | eBay
Apple iMac 24-inch Early 2009 3.06GHz Intel Core 2 Duo (MB420LL/A) – UNICOM, Inc.
Apple Imac 20" Early 2009 A1224 Intel Core 2 2.66ghz 4gb Ram High Sierra & More | eBay
iMac 2017 and old iMacs compared: Needed updates, one bummer - CNET
Les Mac compatibles avec macOS Sierra | MacGeneration
PSA: macOS Sierra drops support for many Macs from 2007, 2008, and 2009 | Ars Technica
Apple 27-inch iMac (2020) first look: The family computer is back | Mashable
Apple iMac 27-Inch With 5K Retina Display (2017) Review | PCMag
New iMac 27-inch with ProMotion display tipped for Q1 2022
Early 2009 duo core (square mac) now running High Sierra patch from Dosdude1 flawlessly. : r/mac
Installing MacOS Sierra on an unsupported Mac (2009 MacBook Pro 5,4) - YouTube
Apple iMac 21.5" All-in-One Desktop Computer i3 3.07GHz 4GB Ram 500GB Mac OS High Sierra w/ Keyboard & Mouse - GRADE B
