title: Unable to install Xcode 4.3.3 in lion 10.7.4
body: <p>I have downloaded xcode 4.3.3 from Apple Site.</p>
  
  <p>I am not able to install xcode 4.3.3 on MAC OS X Lion 10.7.4. I have searched this site to get the answer and none seems to work.</p>
  
  <p>I have dual boot Leopard and Lion OS in my mac mini. There is no xcode.app in Applications to delete it.
  I tried launchpad also and there is no xcode.app</p>
  
  <p>I have xcode 3.1.4 in Leopard. Is it causing any trouble to install this?? </p>