title: After installing Xcode 7 I can't build and run projects anymore as document fails to open
body: <p>EDIT: This question refers to teh pre-release version of Xcode 7, hence it may not be relevant if you are running the currently released version as some issues may have been fixed.</p>
  
  <hr>
  
  <p>I get the following:</p>
  
  <blockquote>
    <p>Failed to connect with the iOS agent. Please file a bug report at
    bugreport.apple.com.</p>
  </blockquote>
  
  <p><img src="https://i.stack.imgur.com/kPkoK.png" alt="enter image description here"></p>
  
  <p>Why is that?</p>
  
  <p>If I look at the details I get:</p>
  
  <blockquote>
    <p>=================================</p>
    
    <h1>    ERROR:</h1>
    
    <p>Failed to find or create execution context for description
     System content
    1x for IBCocoaTouchFramework-EightAndLater w/ default fidelity
    (Failure reason: Software caused connection abort): Failed to find
    newest available Simulator runtime (Failure reason: Software caused
    connection abort): Simulator verification failed. (Failure reason: A
    connection to the simulator verification service could not be
    established.)</p>
    
    <p>Error Domain=NSPOSIXErrorDomain Code=53 "Failed to find or create
    execution context for description
     System content
    1x for IBCocoaTouchFramework-EightAndLater w/ default fidelity"
    UserInfo=0x7fcf5961ebd0 {NSLocalizedDescription=Failed to find or
    create execution context for description
     System content
    1x for IBCocoaTouchFramework-EightAndLater w/ default fidelity,
    NSUnderlyingError=0x7fcf58b72950 "Failed to find newest available
    Simulator runtime"}</p>
  </blockquote>