Image credit: Engadget

Apple has just confirmed what we’ve been suspecting all along, that the next upcoming Mac OS X revision dubbed Lion will be sold via the Mac App Store as a digital download price at just $29 and weighing in at a whopping four gigabytes. The software won’t retail as a boxed copy variant. It will be available in July for everyone, with developers receiving a preview build at the show, Apple executives confirmed during the keynote talk that kicked off WWDC 2011 here in San Francisco’s Moscone West. Check out our complete WWDC 2011 coverage and follow us @9to5mac as we update you on the latest.