I have a macbook/macbook pro and an apple tv that are both around a year to two years old. My mother has a BRAND NEW apple tv and a BRAND NEW macbook/macbook pro. Same models for both of us just mine are a bit older. Whenever I play videos from my macbook to either apple tv they play fine. However, when she attempts to play a video from her new macbook it won't play audio and a lot of the videos will load but will never start playing. I've checked her settings and I can't seem to figure anything out. I've got a few other ideas I'm going to try but I figured I'd see what y'all could figure out. Thanks!
p.s. In my question I referred to our laptops as macbook/macbook pros because, and I could be highly mistaken, they no longer really make either. Instead they have essentially combined the two and just have the new unibody macbooks.