Apple recently seeded the first beta of OS X 10.9.2 to developers, and the update has notably been discovered to include FaceTime Audio. The feature has reportedly been “integrated deeply” into Messages and FaceTime on Mac, enabling Mac users to enjoy the same free voice calling feature that has been available on iPads, iPhones, and iPod touches since the release of iOS 7 earlier this year. Quality of FaceTime Audio calls is markedly higher…