title: Xcode Organizer: can not use iPhone (dyld_shared_cache_extract_dylibs failed)
body: <p>When plugging my iPhone in and starting the Xcode organizer, a yellow circle next to the device show me that "This device is busy or otherwise unusable by Xcode."
  The Organizer is then processing two files (the second one takes quite a while to finish) and afterwards I get the error message as shown in the screenshot.</p>
  
  <p>I tried to google for that error message ("dyld_shared_cache_extract_dylibs failed") but could not find anything useful.
  I tried a couple things: repair permissions of my harddrive and run "sudo update_dyld_shared_cache -force". Still getting the error message.</p>
  
  <p>I am running iOS 4.2.1 and Xcode 3.2.5. I have not updated Xcode after updating from 4.2 to 4.2.1 (I think).
  <img src="https://i.stack.imgur.com/mDRff.png" alt="alt text"></p>
  
  <p>The Xcode console is empty but the regular OS X console shows this:</p>
  
  <pre><code>1/22/11 10:56:19 PM     Xcode[4187]     Started symbol copying process
  1/22/11 10:56:19 PM     Xcode[4187]     Skipped copying file 1 of 2 ("processed" sentinal found)
  1/22/11 10:56:19 PM     Xcode[4187]     Skipped processing file 1 of 2 ("processed" sentinal found)
  1/22/11 10:56:19 PM     Xcode[4187]     Skipped copying file 2 of 2 ("copied" sentinal found)
  1/22/11 10:56:19 PM     Xcode[4187]     Started processing file 2 of 2
  1/22/11 10:56:20 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  1/22/11 10:56:20 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  1/22/11 10:56:20 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  1/22/11 10:56:21 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  1/22/11 10:56:21 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  1/22/11 10:56:22 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  1/22/11 10:56:22 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  1/22/11 10:56:22 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  1/22/11 10:56:23 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  1/22/11 10:56:23 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  1/22/11 10:56:23 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
  </code></pre>
  
  <p>This error message is then repeated constantly. </p>