Checking for New Versions of QuickTime
From time to time, Apple releases new versions of QuickTime. If you’re connected to
the Internet while using QuickTime Player, you’ll be notified when there’s a newer
version of QuickTime available. It’s a good idea to have the latest version of the
software installed on your computer.
To check for a new version of QuickTime (if you are using Mac OS X), choose QuickTime
Player > Update Existing Software. In Windows, choose Edit > Preferences > QuickTime
Preferences, and then choose Update Check.