How to Update the Drivers in a MacBook Pro 8600M GT

Click the Apple button in the upper left corner of your MacBook Pro screen. Select 'Software Update...' from the menu that appears. Your Mac will check for available updates, including video card drivers.
Select 'Show Details' in the window that appears to see a list of updates. If there is a driver update available for your Nvidia 8600M GT video card, you will see it on the list. All available updates are checked off for installation by default, but you can uncheck any you don't want to install.
Press 'Install Items' at the bottom of the window. Mac OS X will install the updates you selected, including new video card drivers. Your MacBook Pro may prompt you to enter a password, and you may need to restart your system after installation.
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