title: Why my XCode 4.2 ask to download iOS 3.2/4.0 Simulator even though I have XCode 3.2 version installed with those simulators?
body: <p>Does different versions of XCode needs different installation of Simulators??</p>
  
  <p>I mean if I have</p>
  
  <p>XCode 3.2 </p>
  
  <ul>
  <li>iOS 3.2 Simulator</li>
  <li>iOS 4.0 Simulator</li>
  </ul>
  
  <p>XCode 4.0</p>
  
  <ul>
  <li>iOS 3.2 Simulator</li>
  <li>iOS 4.0 Simulator</li>
  </ul>
  
  <p>XCode 4.2</p>
  
  <ul>
  <li>iOS 3.2 Simulator</li>
  <li>iOS 4.0 Simulator</li>
  <li>iOS 5.0 Simulator</li>
  </ul>
  
  <p>Why does one simulator works for all newer versions of XCode?</p>