title: iOS Simulator 8.1 SDK missing in XCode 6.2
body: <p>Developers I'm supporting just got new Macs with XCode 6.2 (Version 6.2 (6C131e)).  </p>
  
  <p>In running xcodebuild we're having failures in running against any earlier version of the simulator, even if it's been downloaded, getting: </p>
  
  <pre><code>:build
  xcodebuild: error: SDK "iphonesimulator7.1" cannot be located.
  :build FAILED
  </code></pre>
  
  <p>I go to Xcode -> Preferences and download the iOS 8.1 and 7.1 simulator, but still they don't show when doing an xcodebuild -showsdks:</p>
  
  <pre><code>xcodebuild -showsdks
  
  iOS Simulator SDKs:
     Simulator - iOS 8.2              -sdk iphonesimulator8.2
  </code></pre>
  
  <p>Ideas?  I can't flip my whole project &amp; CI pipeline to build against 8.2 just yet, wondering if there's a trick to getting the 7.1 / 8.1 sim working from the command line tools in Xcode 6.2.</p>