Itunes 12.6.3 Access

iTunes 12.6.3 was a unique, "secret" release from Apple designed to restore the and Ringtone management —features that had been removed in the primary 12.7 update. Key Features of iTunes 12.6.3

For modern iPhones (iOS 13+), stick with the latest iTunes or the Finder (macOS Catalina+), as 12.6.3 lacks device drivers and security updates. itunes 12.6.3