Updated November 3, 2016: “New with version 1.1 is a UI Kit for the all new MacBook Pro Touch Bar. Including common layouts from the macOS HIG and some system app layouts.”
macOS Sierra UI Kit (for Sketch) by Alexander Käßner, requires Sketch 40+.
The Sketch document uses the latest features like Text Styles, Symbols and Auto Layout. You can download this for FREE and use it to create your own retina ready designs!