1. Select [Applications] -> [Utilities], and then double-click [Audio MIDI Setup].
2. Select [AG06/AG03] from the list on the left side of the [Audio Devices] window. If the [Audio Devices] window is not displayed, in the menu select [Window] -> [Show Audio Window].
3. Control-click [AG06/AG03] in the list, and select [Use this device for sound output].
4. In the same way, control-click [AG06/AG03] in the list, and select [Use this device for sound input]. After completing steps 3 and 4, mic and speaker icons will appear next to the AG series unit in the list.
5. Quit Audio MIDI Setup
6. Turn the [(icon)] level knob to adjust the input level (volume) from the computer. Adjust the balance with the other channels, while turning the two knobs in the [MONITOR] section to adjust the overall volume.