To turn on Activation-only Mode on Mac OS X:
Make sure iTunes isn’t running and then open Terminal.
In Terminal, enter a command:
To turn activation-only mode on: defaults write com.apple.iTunes StoreActivationMode -integer 1
To turn activation-only mode off: defaults delete com.apple.iTunes StoreActivationMode
To turn on Activation-only Mode on Windows:
Make sure iTunes isn’t running, and then open a Command Prompt window.
Enter a command:
To turn activation-only mode on: "C:\Program Files\iTunes\iTunes.exe" /setPrefInt StoreActivationMode 1
To turn activation-only mode off: "C:\Program Files\iTunes\iTunes.exe" /setPrefInt StoreActivationMode 0