Apple has released a new QuickTime update, which will be of particular interest to owners of MacBook and MacBook Pro unibody computers because it fixes a widely publicized issue where some users were unable to play legally purchased movie files from iTunes on external displays.
You see, Apple’s new mini DisplayPort enforces HDCP protection
. But while the scheme is intended to prevent digital copying of high definition content, several users were complaining last week about being unable to playback standard definition iTunes movies over a mini DisplayPort to VGA connector. According to notes provided with the update, QuickTime 7.5.7 addresses this issue, meaning that current SD movie content purchased or rented on a Mac should playback unrestricted.
You can download this update via Software Update (Apple menu > Software Update) or by visiting the Apple support website