One of the main new features of OS X Mountain Lion is Power Nap. Power Nap allows your SSD Mac to keep itself updated and synced to the cloud, even while it sleeps. While its a highly-touted feature of Mountain Lion, support for the 2011 and 2012 MacBook Air and the new MacBook Pro with Retina display was left out. Today, Apple released a download that enables Power Nap for the aforementioned MacBook Air units, with the promise that an additional download that'll enable the feature on the MacBook Pro with Retina display is "coming soon." You can get Mountain Lion now for $19.99 on the Mac App Store.
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