How to install macOS High Sierra on a Unsupported Mac (iMac 7,1 2007 Model) - YouTube
Apple iMac 24-inch Early 2009 3.06GHz Intel Core 2 Duo (MB420LL/A) – UNICOM, Inc.
Amazon.com: Bootable DVD DL for Mac OS X 10.13 High Sierra Full OS Install Reinstall Recovery Upgrade
Apple iMac 20-inch 2.0GHz Core 2 Duo (Mid 2007) MA876LL/A 2 | mac of all trades
CPU Upgrades So 2007 iMacs Can Run High Sierra | Low End Mac
Anything that can run macOS Sierra can also run macOS High Sierra | Ars Technica
Apple iMac 3.06GHz Core 2 Duo 4GB RAM 500GB HDD High Sierra NVIDIA GeForce 9400 | eBay
Apple Seeds First Beta of macOS High Sierra 10.13.3 to Developers [Update: Public Beta Available] - MacRumors
iMac (Mid 2007) | Low End Mac
macOS High Sierra Patcher
Mid 2007 iMac CPU Upgrade & Tiger Thru Mojave OS Demo - YouTube
$45 iMac from 2007! - YouTube
How to Install macOS High Sierra on an Unsupported Mac - YouTube
Managed to pick this 2007 iMac for $20 on OfferUp today that was stuck in recovery mode... several hours later it's back up and running again :) : r/mac
Installer macOS High Sierra sur un Mac non supporté | Le journal du lapin