To unlock the Pro features on a machine running a compatible operating system, follow these steps: On Windows Open QuickTime Player 7.

Apple has discontinued the sale of QuickTime Pro keys.

QuickTime 7 was originally distributed as a free player. To access its advanced features, users had to purchase a 20-digit registration code from the Apple Store to unlock the "Pro" tier.

The registration system is extremely strict. A key will only validate if the Registered To name perfectly matches the text tied to the key, including spaces and punctuation.