title: How to show the share button in Mountain Lion?
body: <p>Mountain Lion offers a built-in sharing button that reveals a menu of sharing services appropriate for the app:</p>
  
  <p><img src="https://i.stack.imgur.com/tXbFh.png" alt="Share button in Safari 6.0"></p>
  
  <p>How can I insert it in my app?</p>