* Why is my LG Smart TV not discovered?
Please make sure that your LG TV and Mac are connected to the same Wi-Fi network. It might take several minutes for the app to find the device. If you have problems discovering your LG TV, here are some trouble shooting tips that can always help.
Restart your router. Just unplug it from the power supply, wait 30 seconds, then plug back in.
Restart your LG TV. Just unplug it from the power supply for a full reboot. Please disconnect it from its power supply for at least 1 minute, then put it back it. Powering off your LG TV is NOT ENOUGH to do a full reboot.
Make sure your Mac and LG TV are on the same WiFi network, same router, and same router channel. Some routers (dual band) have create both a 2.4Ghz and a 5Ghz wireless network. So it’s important not to have your Mac on 5Ghz and TV on 2.4Ghz, or the other way around.
Use an AC or N router. New routers support WiFi AC & N, whereas old ones might only support WiFi B and/or G. WiFi B & G are not really up to modern networking tasks, so please use an AC or N router.
In many cases the firewall on your computer may be preventing the devices from communicating. Apple has provided similar instructions here: http://support.apple.com/kb/ht1810 .
If you are running an anti-virus product, such as Norton, you may have to follow a similar process. This is very important as anti-virus applications often have their own firewall and network traffic blockers. It is often easier to fully disable these applications while testing for connection and then reenable and make adjustments later.
It's also possible that the firewall on your router is preventing communication. If the above steps check out, then you may need to check that your router is configured to properly allow certain traffic. Most home networks will not need any special configuration, but sometimes you may need to change a setting or two on your router to allow media streaming on your network.
There is a setting "LG Connect Apps" on your WebOS based LG TV that controls whether the device can be discovered. Please set the "LG Connect Apps" option on your LG TV to "ON", and keep it that way.
On older models of LG TVs, there is a similar setting that might be called DLNA DMR (Digital Media Renderer). Please change it to "ON" and keep it that way.