Send audio to any networked Airplay device in Mac

You can easily reduce all of the wires on your desktops thanks to wireless mice, keyboards, trackpads, and even the streamlined cords that connect a Thunderbolt Display to your MacBook.  But if you’ve ever wanted to connect a premium set of speakers to your Mac, you had to attach a wire to the Line-Out or Headphone port.  With Mountain Lion, you can now stream the system’s audio wirelessly to any AirPlay-compatible speaker — that means not just your iTunes music library, but your entire system sound output, including every little sound alert, bell and beep.  And if your current speakers do not support AirPlay, you can gett an AirPort Express to take advantage of this new feature.