Apple has finally released a promised graphics firmware update for its 17 in. MacBook Pro portable.

The 17 in. MacBook Pro — recently released.

The patch, announced at Macword back in January, addresses stability issues with the computer’s display. A sigificant number of users reported seeing vertical lines disrupting their screens, after the new 17 in. unibody MacBook Pros were released earlier this year.

The update is available at the Apple support Web site.