Erica Sadun , infamous Apple developer, iOS Hacker and TUAW writer, has developed a utility called AirPlayer that turns your Mac into a “receiving station” for airplay. This is an alpha version with several bugs and interface to say the least basic, but already in operation.
AirPlay is the great functionality that was announced with IOS 4.2, which allows us to send any video and audio content from our iOS portable device to the Apple TV or other devices or compatible speakers.
Setting up AirPlay is very simple. Download (Click Here) and run the application, with banner included, click on Start AirPlay Service and from that moment our iOS detect the Mac. That’s it.