Identify your MacBook model - Apple Support
MacBook (2006–2012) - Wikipedia
Identify your MacBook Air model - Apple Support
Used Apple White MacBook Pro High Sierra late 2009 | eBay
Identify your MacBook Pro model - Apple Support
Sierra update arrives on Macs: Four things to look for
MacOS High Sierra Compatible Macs List | OSXDaily
macOS 10.12 Sierra Unsupported Macs Thread | MacRumors Forums
Apple MacBook 13” A1342 Late 2009 Core 2 Duo 2.26GHZ, 4GB 250GB, High Sierra | eBay
Apple Macbook 13" A1342 Unibody Late 2009 2.26GHz 500GB 4GB 10.13 High Sierra | eBay
MacBook Pro 2009 Upgrade Series PT.1 High Sierra Install - YouTube
Apple Macbook 13" A1342 Unibody Late 2009 2.26GHz 250GB 4GB 10.13 High Sierra | eBay
Identify your MacBook model - Apple Support
macOS High Sierra Review | Macworld
Identify your MacBook Pro model - Apple Support
MacOS Sierra: top five things you need to know about Apple's new Mac software | Apple | The Guardian
macOS Sierra on MacBook late 2009 - YouTube
Identify your MacBook Air model - Apple Support
USED APPLE MacBook Air 2009 (A1304) 13" Intel 2.13 GHz Core 2 Duo 2GB RAM 128SSD | eBay
MacBook 6,1 (13-Inch, Late 2009) - Full Information | iGotOffer
Identify your MacBook Air model - Apple Support
MacBook 6,1 (13-Inch, Late 2009) - Full Information | iGotOffer
MacBook Air "Core 2 Duo" 1.86 13" (Mid-09) Specs (Mid-2009, MC233LL/A, MacBookAir2,1, A1304, 2334*): EveryMac.com
The MacOS Sierra Compatibility List | OSXDaily
Identify your MacBook Air model - Apple Support
Macs Able to Run macOS Sierra Remain Compatible With High Sierra - MacRumors
