Last month, when writing about Apple’s Fall 2013 Product Announcement, I’d guessed at a few announcements that they didn’t end up making. Today, Apple announced all of those things and more. OS X Mavericks OS X 10.9 ”Mavericks”. Available today. Free (down from $19.99 last year). MacBook Air Lighter and faster than the last model. Faster 802.11ac wireless networking, Bluetooth 4.0 and Thunderbolt 2. Available today. Starting at $999. MacBook Pro with Retina Display Lighter and faster than the last model.