Mac OS X identifies your application through its signature, a unique four-character sequence. Registering your creator code with Apple helps ensure that your creator code is unique and will not conflict with the signature of any other application.
Learn more about Data Type Registration and how to register your creator code by visiting our Frequently Asked Questions
If you need to make a change to a creator code that you have previously registered, submit your request to us. Please include the name of the registered product and its creator code along with the requested change. Submit