title: Install XCode 6 on OSX 10.8.5
body: <p>I have Xcode 4.6 and Xcode 5.1.1 installed on my mac with OS X Mountain Lion (10.8.5)</p>
  
  <p>Now I want to install Xcode 6 and keep Xcode 4.6 and Xcode 5.1.1 installed.</p>
  
  <p>Is this a good idea or would the old Xcode 4.6 and Xcode 5.1.1 interfere with the new version Xcode 6?</p>