Yesterday I tried to use Apple TV, it connected but I realised that I don't have Airplay so I disconnected the Apple TV. I then transfered some files using a USB and after that I have no sound on Mac. I get a stop sign when trying to change volume. There is no output device listed. I have restarted many times, tried using the headphone port and USB headphones. USB headphones work, but the headphone port for regular headphones wont work at all. I can get sound through USB headphones or if I pair Mac with Apple TV, we get sound on our tv but no picture. I just want sound back on my Mac.
Please can anyone offer any advice or solution?
Best Answer
This discussion in Apple Support Community may shed some light. First, check to see that Mute is not checked. You may need to reset the system PRAM. Here are the steps: (From Apple Support)
If you are nervous about doing so, if you have an Apple Store close by, you may wish to make an appointment with the Genius Bar.