How to Install macOS Sonoma on Unsupported Macs, for Security Improvements - The Mac Security Blog
Mac Pro 4,1 - Full hardware and software upgrade to Big Sur - YouTube
How to Upgrade Mac Pro Processor (Early 2009/MacPro4,1): EveryMac.com
MacBook Pro - Wikipedia
iMac (Early 2009) | Low End Mac
Retro Review: 2009 Mac Pro in 2022 | iMore
Mac Pro (Early 2009) A1289 Parts
It's old as heck but still kicking! Mid 2009 MacBook Pro (MacBook Pro 5,5) I'm hoping to use opencore legacy patcher to install Monterey on it. : r/macbookpro
What's the latest OS I can use on early 2009 Mac Pro? | MacRumors Forums
Used Mac Pro 4,1 2009, Computers & Tech, Desktops on Carousell
Apple Mac Pro (Early 2009) 1 x 2.66gHz, 2TB, 8GB RAM, OSX 10.10.5, *Used* A1289 | eBay
Mojave DMG
Installed macOS Catalina on my MacBook Early 2009 | .NET Development by Eric
The Definitive Classic Mac Pro (2006-2012) Upgrade Guide
Apple Mac Pro (Winter 2009) review: Apple Mac Pro (Winter 2009) - CNET
Identify your iMac model – Apple Support (UK)
Complete Mac Pro 4,1 soft- and hardware upgrade – All the way up to Big Sur | Jensd's I/O buffer
Mac Pro | 2009 | Eight Core 2.66 GHz - Techable.com
Mac Pro Early 2009 – Full Tech Specs, Release Date, and Price
macOS Mojave on old unsupported 2009 Mac Pro (Review, Installation, Performance Test) - YouTube
Mojave on a 10 Year Old MBP : r/MacOS
PSA: macOS Sierra drops support for many Macs from 2007, 2008, and 2009 | Ars Technica
Identify your MacBook Pro model - Apple Support
The new Mac Pro (Early 2009 model) | Photo This & That
