Apple’s WWDC 2012 keynote event introduced updated MacBook Pros and Airs and a new next-gen MacBook Pro with a Retina Display, and previewed iOS 6 and OS X Mountain Lion. – WWDC 2012 live blog: http://tinyurl.com/7eqnt74 – Retina MacBook Pro announced, Pro and Air updated:http://tinyurl.com/bm3q3uf – Mountain Lion…