Apple's recent 'Keyboard Update' contained a new version of IOUSBFamily (2.5.0) which fixed the "bug" in the way USB resources are released when, for example, the Mirror widget is closed or the Photobooth is force-quitted. I did not notice any deficiencies before the 'Keyboard Update', so I grabbed the old version of IOUSBFamily from a backup and replaced it. I've uploaded the old version (2.4.6) here, if you want to give this a try: http://fxoz.com/IOUSBFamily.kext.dmg.zip Make a backup of the existing IOUSBFamily.hext, then copy the downloaded version to /System/Library/Extensions, then run the following command in Terminal, then reboot. sudo chown -R root:wheel /System/Library/Extensions/IOUSBFamily.kext The Mirror widget/Photobooth force-quit hacks will work again. This will enable you to eliminate the whine without incurring the battery life penalty that results from trashing the power management completely.