Wirelessly mirroring your Mac screen on your Samsung TV used to be difficult. Not anymore. "Mirror for Samsung TV" allows you mirror your screen as well as audio to any Samsung Smart TV in your network. Just run the app, select your TV from the list and... presto! That is all you need to do to mirror your screen!
You can download the app from the Mac App Store: http://apple.co/2242oo7
New!!: Mirror for Samsung TV is now also available for iPhone and iPad. Check out https://youtu.be/c97UZy2mKSo
You can find the iOS version on: https://itunes.apple.com/us/app/mirror-for-samsung-tv/id1249385711?ls=1&mt=8