my TV has Wifi does that make any difference? when my tv was connected to my pc I had to add its IP address to the list of accepted connections, can this be done on my mac?
The previous answer assumed you wanted to set up the TV as a display; I believe you want to network it, correct?
If so, then first you need to get it on your home network through whatever router you are using. Once it's connected up, then you can work on connecting your Mac. What router are you using?
If you've already got the TV working on the internet and network, find it's IP address and use the menu Go>Connect to Server... and enter it; that may show you if you're connected up. I don't know what software runs on the TV, so I can't get you much past there. If the TV is running any kind of file server it will show up. If not; don't despair, try the steps below.
If the TV is only capable of displaying meda served from the Mac, then try Playback; it's software from Yazsoft. It installs on the Mac and is a media server; it sends pictures, movies, music etc to my Playstation. So it may work with the TV as well. I believe it should work for you; the trick is getting the network connections going. Download the demo and give it a try. You start it on your Mac and it should take care of opening the Mac firewall for you; but again, if you router has a separate firewall it may prevent the Mac and TV from communicating.
Rob