Apple has released a firmware update for the 17-inch MacBook Pro.The update adjusts fan behavior in the 17-inch MacBook Pro. Apple warns that as this is a firmware update, it is essential to follow the company\u2019s installation instructions to the letter.To install the 1MB update, users must quit all open applications and then click Restart in the firmware install window. A status bar indicates the progress of the update. During the update, the Mac\u2019s fans will run at full speed, but will return to normal once the update completes. The Mac will then restart.Information about the firmware update is available here.-Macworld staff, Macworld.co.ukCheck out our CIO News Alerts and Tech Informer pages for more updated news coverage.