How to install macOS 10.12 Sierra on unsupported Mac hardware
Apple iMac 24-inch Early 2009 3.06GHz Intel Core 2 Duo (MB420LL/A) – UNICOM, Inc.
MacOS High Sierra Compatible Macs List | OSXDaily
The MacOS Sierra Compatibility List | OSXDaily
Identify your iMac model - Apple Support
Retro Review: 2009 Mac Pro in 2022 | iMore
List of Macs Compatible With macOS Sierra - MacRumors
SOLVED: Upgrade OS to High Sierra? - iMac Intel 20" EMC 2316 (Edu) - iFixit
Apple macOS Sierra: how about that compatibility list? | Mac mini, Latest macbook air, Apple
macOS Sierra | Low End Mac
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Identify your iMac model - Apple Support
See which Macs will -- and won't -- work with MacOS - CNET
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iMac 24" 2.66GHz (Early 2009)* | mac of all trades
10 Things You Need to Know About macOS Sierra | PCMag
Apple A1311 iMac Computer 21.5 in Core 2 Duo 3.06 GHz 8GB RAM 500GB HD Late 2009 | RecycledGoods.com
PSA: macOS Sierra drops support for many Macs from 2007, 2008, and 2009 | Ars Technica
iMac 2009 21.5” Core 2 Duo 3.06GHz 4GB RAM 250GB HDD High Sierra FHD GeForce | eBay
