whatsupdarling

Hello, I bought LG webOS UM7100PLB and whenever I try to watch movies from my laptop (Macbook Pro Retina) on my tv the movies stutter and jam. It is still watchable but extremely annoying so I just plug HDMI cable to watch it. The problem is not also with movies when I scroll or do anything on my laptop, on my LG is slow and stutters as well. Anybody knows what the problem would be? I attached a screenshot. Thanks for your help, Kamila