Guide for users of the latest Apple system, Mac OS X Leo, who wish to downgrade their version of the iTunes software, you must remove the software completely before re-installing iTunes.

preamble
• Mac OS X 10.7
• Terminal
Please note, deletion of the iTunes software will prevent all synchronization backups of your iDevice and some may entrainner System Error in some cases.

 
guide

 
• Go to the folder of your applications.
• View information in iTunes (cmd + i).
• Unlock the lock with your password.

• • Click "+".
  • Add an account "Administrators".
  • assign "Reading and Writing."
  • Close window.

Launch your Terminal

                                                                                                                                           [ via]

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