MacOS High Sierra Compatible Macs List | OSXDaily
Mac OS Catalina Running on Mid 2009 MacBook - YouTube
MacBook Pro 13-Inch "Core 2 Duo" 2.26 (SD/FW) Specs (Mid-2009 13", MB990LL/A, MacBookPro5,5, A1278, 2326*): EveryMac.com
Will Your Mac Run OS X Mountain Lion? The Mountain Lion Compatible Macs List | OSXDaily
15″ MacBook Pro (Mid 2009) | Low End Mac
The MacOS Sierra Compatibility List | OSXDaily
Identify your MacBook model - Apple Support
How to Install macOS Monterey on Unsupported Macs, for Security Improvements - The Mac Security Blog
MacBook Pro mid-2009 ... please help me pimp it up!! | MacRumors Forums
Review Apple MacBook Pro 13 Mid 2009 2.53 GHz - NotebookCheck.net Reviews
PSA: macOS Sierra drops support for many Macs from 2007, 2008, and 2009 | Ars Technica
MacBook Pro | Core 2 Duo 3.06 GHz | 17 Inch | Mid 2009 - Techable.com
MacBook Pro | Core 2 Duo 3.06 GHz | 15 Inch | Mid 2009 - Techable.com
Review Apple MacBook White 5.2 Mid 2009 - NotebookCheck.net Reviews
Upgrade to latest OS on Macbook Pro Mid 2009 | MacRumors Forums
Identify your Mac Pro model - Apple Support
MacBook Pro 15" Unibody 2.53 GHz Mid 2009 - iFixit
Best Mac OS Version (Hint: macOS Sierra and higher) - MacMyths
MacBook (2006–2012) - Wikipedia
Identify your MacBook Pro model - Apple Support (IN)
OS X El Capitan Compatible Macs and System Requirements: EveryMac.com
MacBook Pro - Wikipedia
OS X EL Capitan Compatible Mac Hardware or Upgrade Requirements
