256GB 2.5 SSD | OS X El Capitan 10.11.6 Loaded | MACBOOK PRO 2009 2010 2011 2012 | eBay
Identify your iMac model - Apple Support
The MacOS Sierra Compatibility List | OSXDaily
Identify your Mac Pro model - Apple Support
How to Install macOS Sonoma on Unsupported Macs, for Security Improvements - The Mac Security Blog
Identify your MacBook Pro model - Apple Support (NZ)
MacBook Pro | Core 2 Duo 2.53 GHz | 13 Inch | Mid 2009 - Techable.com
The macOS Sierra Compatibility List
Identify your iMac model - Apple Support (CA)
Identify your iMac model - Apple Support
Identify your MacBook Air model - Apple Support (CA)
Identify your iMac model – Apple Support (UK)
Identify your MacBook Pro model - Apple Support
Bootable DVD DL for Mac OS X 10.11 El Capitan... by Generic
macOS compatibility: What macOS versions can my Mac run? | Macworld
The MacOS Sierra Compatibility List | OSXDaily
Need some help (Mid 2009 MacBook Pro) : r/mac
macOS compatibility: What macOS versions can my Mac run? | Macworld
Upgrade to latest OS on Macbook Pro Mid 2009 | MacRumors Forums
OpenCore Legacy Patcher
MacOS High Sierra Compatible Macs List | OSXDaily
