Apple has posted MacBook Pro Video Update 1.0 (“Snow Leopard”). It addresses an issue where MacBook Pro (15-inch Mid 2010) computers may intermittently freeze or stop displaying video.
MacBook Pro Video Update 1.0 (“Snow Leopard”) requires Mac OS X 10.6.8 or higher and is a 51.45MB download. You can obtain it via the Software Updates component of Mac OS X’s Systems Preferences app.