Since 10.8, OS X has had native Airplay support. Even if your Mac doesn't have the hardware to do Airplay video, you can select Airplay as a sound output device. Applications can output to Airplay via the CoreAudio API, documented at<a href="http://joris.kluivers.nl/blog/2012/07/25/per-application-airplay-in-mountain-lion/" rel="nofollow">http://joris.kluivers.nl/blog/2012/07/25/per-application-air...</a>.<p>Of course, Windows users are pretty screwed.