The OS X 10.9.2 beta first distributed to developers this afternoon includes Apple's FaceTime audio, a Voice over Internet Protocol (VoIP) feature that was originally introduced to the iPhone with iOS 7. With FaceTime audio on both iOS and OS X, Apple users will be able to seamlessly call one another from any device. FaceTime audio is designed to allow users to initiate voice-only calls with other FaceTime users without turning on the accompanying video feed. Currently, Macs running Mavericks only have access to the standard FaceTime app, which bundles both video and audio. Users who are interested in voice-only communications on Macs have to resort to using third-part
