Closing the lid on your MacBook Pro with Retina display is going to get a bit more useful thanks to an update that brings Power Nap to the laptop. The feature — which is only available for those running Mountain Lion on select laptops — lets the machine periodically check for updates as well as new Calendar, Contacts, Mail, Notes, and Reminders while asleep. Power Nap also updates your iCloud documents, Find My Mac location, Photo Stream, and Time Machine backups. By default the feature only works when plugged into the power source, but you can enable it in the Energy Saver system settings menu to operate when on battery, too

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MacBook Pro with Retina display gets Power Nap via firmware update

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