Potential audio problems when connecting a Mac to a projector using HDMI There is, however, a list of Mac computer models that do support both audio and video over the HDMI cable with the appropriate adapter. There is no definitive list of these computer models that do not support audio over the video cable.
Roughly, this includes Mac laptops made before Mid-2010. Right now, we are aware of certain Mac computers that cannot output audio over the HDMI cable. However, not all computers that have Mini DisplayPort/Thunderbolt can send the audio over the same cable as video due to incomplete design by the manufacturer. For Mac models that have Mini DisplayPort/Thunderbolt, it is possible to use an HDMI adapter to connect to some of our newer classrooms and project a much higher quality image.
