MacOS – How to upgrade a 2009 MacBook Pro from 10.11.6 to 10.12

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I have a 2009 MacBook Pro running OS X 10.11.6 "El Capitan". Can I upgrade to macOS "Sierra" 10.12, and if so, how? I can't find it on the App Store.

Best Answer

The maximum supported OS for all of the MacBook Pros released in 2009 is OS X El Capitan 10.11.6 (15G31).

So your model of MacBook Pro can not be officially upgraded to macOS Sierra 10.12.