OS X Mavericks Taps MacBook Pro's Ambient Light Sensor To Detect Movement

We're not sure if MacBook Pro owners have noticed, but your laptops come with built-in ambient light sensors which has been used for the most part to dynamically adjust the brightness of its displays, as well as adjust the backlighting of the keyboard. Well now it seems that in the recently OS X Mavericks, Apple has tapped the ambient light sensor to do more than that and will now be able to detect when users are not around their computer, thus putting the computer to sleep, spinning down the hard drives, or turning off the display in a bid to save energy.

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