I have a Macbook Pro Late 2013 connected on TV via plugable MINI DISPLAYPORT/THUNDERBOLT TO HDMI 2.0 with a HDMI 2.0 cable. When connecting, I get only 4k resolution at 25/30 Hz with the sound of the macbook going to the TV. After much reading, I learned that the adapter supports 4k@60Hz through the SwitchResX app. It really works but the problem is that now I do not have sound going from the Macbook to the TV. Could someone tell me how to make the sound work again? Thanks!