Someone stitches the pictures together [2], it's lone pine peak in the left, and mt whitney in the right.

[1] source: http://9to5mac.com/2016/06/14/ios-10-macos-10-12-sierra-wallpapers-iphone-ipad-mac/
[2] image: http://a.disquscdn.com/uploads/mediaembed/images/3800/3057/original.jpg