Sierra Mac OS 10.12
System Requirements

 General Requirements

OS X v10.6.8 installed already or later
4GB of memory (Miss Mac recommends 8GB)
8GB of available space

Some features require an Apple ID; terms apply.

Some features require a compatible Internet service provider; fees may apply.

 Supported Models

(Late 2009 or newer)
(Late 2009 or newer)
MacBook Pro
(All models 2010 or newer)
MacBook Air (All models 2010 or newer)
Mac Mini (Al models 2010 or newer)
Mac Pro (Mid 2010 or newer)

And How do I tell which model I have?

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