title: How do you update Xcode on OSX to the latest version?
body: <p>What is the easiest way to update Xcode on OSX?</p>
  
  <p>I see this in the terminal:</p>
  
  <pre><code>$ brew install xxxxxxx
  Warning: Your Xcode (4.3.3) is outdated
  Please install Xcode 4.6.
  </code></pre>
  
  <p>But when I go to open up <code>Xcode &gt; Preferences &gt; Downloads</code>, it says there are no updates?</p>