This cable does not have audio output in computer series of MB466, MB467 ,MB470, MB471,MC026,MB604
HDMI port will not have audio output if your computer does not support HDMI audio output.

 1.  Support Mini Display Port 1.2a input and HDMI1.3b output.

  2. Support HDMI highest video resolution 1080p.

  3. Support 10.8Gbps bandwidth

  4. Support HDMI 12bit per channel (36bit all channel) deep color.

  5. Support uncompressed audio such as LPCM.

. 6.Support compressed audio such as DTS Digital, Dolby Digital(including DTS-HD and Dolby True HD)