title: Install XCode 5.1.1 on OSX 10.8.5
body: <p>I have <code>Xcode 4.6</code> installed on my mac with <code>OS X Mountain Lion (10.8.5)</code></p>
  
  <p>Now I want to install <code>Xcode 5.1.1</code> and keep <code>Xcode 4.6</code> installed. </p>
  
  <p>Is this a good idea or would the old <code>Xcode 4</code> interfere with the new version 5?</p>