title: Error during Xcode Component Installation
body: <p>I just installed a software update that I was prompted for, presumably affecting Xcode.  Now when I start Xcode, I am presented with a dialog box which states that Xcode must install the Mobile Device Framework before continuing.  When I try to do this, after providing my password, it fails with &quot;An unknown error occurred. See the install log for more details.&quot;  I do not see anything useful in install.log that identifies the problem.  I've tried re-installing multiple times and rebooting to no avail.</p>
  <p>I'm currently running Xcode 4.3.  Perhaps I need to upgrade to 4.4?  Has anyone else run into this problem?</p>