What is wrong with my Mac Pro. The volume keys on the keyboard used to everything on my computer. Now it only controls system volume functions. When I listen to music or watch videos, I can not control the volume with the keyboard. Why not???
You may find the article below helpful.
Mac OS X: How to change the behavior of function keys
Hey mate - go to 'system preferences' and select 'sound'. On the 'output' tab you should see a box with the title 'Select a device for sound output:' select 'Display Audio USB'.
Hope this helps :-)
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