title: storyboard not opening in xamarin ios designer
body: <p>This is my first project with Xamarin.iOS and am getting familiarized with the IDE for iOS.</p>
  
  <p>I created a simple Xamarin.iOS 'Single Page Application' project. I did not
  add any code - the project files are as they are when created from 'New
  Project'.</p>
  
  <p>When opening the main storyboard file in Xamarin Studio, the spinner image just keeps spinning and hangs. When I try to close Studio, it also hangs. I have to kill the process in Activity Monitor.</p>
  
  <p>If I open the storyboard in 'Source Code Editor' or in Xcode Interface Builder,
  it opens fine.</p>
  
  <p>I did some research and saw this discussion thread on the Xamarin forums:
  <a href="https://forums.xamarin.com/discussion/23566/ios-designer-bug-there-was-problem-rendering-this-document-not-opening-storyboard" rel="nofollow">https://forums.xamarin.com/discussion/23566/ios-designer-bug-there-was-problem-rendering-this-document-not-opening-storyboard</a></p>
  
  <p>I tried the solution that was mentioned by user Krunoslavterle, by opening the
  storyboard in code editor but it still does not open. Here's what he posted:<br />
  <em>"I had the same issue, resolved by opening storyboard with TextEdit,
  there I changed: version="3.0" to 2.0, save, refresh and try to open the
  storyboard. Xamarin studio will throw an error ("The format of this
  legacy storyboard file is not supported"), then click on ("Upgrade this
  file to a supported format"). After that the storyboard can be opened."</em></p>
  
  <p>I have checked memory usage to see if it doesn't have enough to open and render
  the storyboard and it has enough memory to spare.</p>
  
  <p>I opened Console.app and saw .spin and .hang logs that I can provide but am not comfortable in posting them publicly as they probably have sensitive info.</p>
  
  <p>My dev environment:<br />
  Macbook5,2 with Mac OS X Yosemite 10.10<br />
  MonoFramework-MDK-4.0.0.143.macos10.xamarin.x86.pkg<br />
  XamarinStudio-5.9.0.431-0.dmg<br />
  Xamarin.iOS: monotouch-8.10.0.267.pkg<br />
  Xcode 6.3.2<br />
  <br /></p>