Here’s how to stream a movie from you laptop or iMac to your Apple TV.
This little beauty is called an airport express. You can buy it from Apple for $99 (USA) or $119 (Australia). It plugs into your home ethernet network (or straight into your ADSL modem) via that little Ethernet connection on the left next to the power cord. Then it shares your internet connection with all your iOS devices via wi-fi. But it has a few tricks up it’s sleeve.