title: The selected device specifies an unsupported architecture
body: <p>I'm trying to launch an Objective C app built on Xcode5 on Xcode6 beta (Version 6.0 (6A215l)). I get the following message when trying to build for any platform except for iPhone 5s:</p>
  
  <p><strong><code>Xcode cannot run using the selected device.</code></strong></p>
  
  <p><code>The selected device specifies an unsupported architecture.</code></p>
  
  <p>It's not even obvious how to begin troubleshoting this as I can't get to the point where the console is activated. Any pointers?</p>