Identify your MacBook Pro model - Apple Support
macOS Sierra | Low End Mac
Identify your MacBook model - Apple Support
MacBook Pro MB985LL A | Core 2 Duo 2.66 GHz | 15 Inch | Mid 2009 - Techable
Will Your Mac Run OS X 10.10 Yosemite? - Make Tech Easier
Mac OS X Leopard - Wikipedia
Identify your MacBook Pro model - Apple Support
macOS Sierra Patch Tool | Software update, Memory support, Osx
15″ MacBook Pro (Mid 2009) | Low End Mac
OS X temp unavaliable? 2009 Macbook Pro - Apple Community
Installing MacOS Sierra on an unsupported Mac (2009 MacBook Pro 5,4) - YouTube
MacBook Pro 13" A1278 Mid 2009 2.26Ghz 500GB HDD 6GB RAM OS X El Capitan | eBay
Seven years on, a MacBook Pro prepares for El Capitan – Six Colors
Mid 2009 MacBook Pro can't install Mac OS… - Apple Community
See which Macs will -- and won't -- work with MacOS - CNET
PSA: macOS Sierra drops support for many Macs from 2007, 2008, and 2009 | Ars Technica
OS X El Capitan review: A modest update, with some welcome changes | Engadget
Identify your MacBook Pro model - Apple Support
How to Upgrade the Firmware of a 2009 Mac Pro 4,1 - iFixit Repair Guide
How to Upgrade Mac to macOS High Sierra | Trend Micro News
MacBook Pro mid-2009 ... please help me pimp it up!! | MacRumors Forums
