Mac OS X 10.4.10: No sound input or output with Plantronics USB headset, microphone, or audio adapter

Issue or symptom

After updating to Mac OS X 10.4.10, there may be no audio input or output from a Plantronics USB audio device (such as microphone or headset).

Solution

1. Make sure the device is connected to a USB port.
2. Open Audio MIDI Setup, which is in the Utilities folder within the Applications folder.
3. Make sure the Default Input pop-up menu (under System Settings) is set to the device.
4. Choose your device from the "Properties For" pop-up menu.
5. In the bottom right area of the window (under Audio Output), deselect the "Mute" checkbox.

This document will be updated as more information becomes available.

Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple's recommendation or endorsement. Please contact the vendor for additional information.