QuickTime Player 7 is incompatible with any macOS version released after macOS Mojave . Modern versions of macOS use QuickTime Player 10, which includes many former "Pro" features for free.
Apple discontinued support for the Windows version in 2016 due to critical security vulnerabilities that will never be patched. QuickTime-7-Pro-Registration-Keys-Full-Version-Download
Historically, QuickTime 7 Pro was unlocked by purchasing a 20-digit registration code from Apple. Since Apple no longer sells these codes, modern "full version" downloads are typically unofficial. Key Features of the Legacy Pro Version QuickTime Player 7 is incompatible with any macOS
QuickTime 7 Pro is a legacy application that is no longer supported or sold by Apple. While you might see "full version download" or "registration key" offers online, these are often associated with outdated or unsecure software distributions. Current Status of QuickTime 7 Pro Historically, QuickTime 7 Pro was unlocked by purchasing
If you are on Windows, and Apple strongly recommend uninstalling QuickTime 7 . Because it is no longer updated, it serves as a potential entry point for malware. Most modern browsers and Windows versions now natively support the formats (like H.264 and AAC) that QuickTime once provided.