If you’ve had trouble getting your USB sound device to automatically be enabled in OS X you’re not alone. Unlike other operating systems, OS X 10.5 Leopard does not automatically enable USB sound devices such as Head sets when they are installed into your Apple computer.

To be able to take advantage of USB head sets or other third party sound devices you’ll need to enable. To enable USB sound devices:

1. Open System Preferences
2. Select Sound
3. Click the output tab
4. Select the Headset or sound device of type USB
   
5. And/Or Click the the Input tab
6. Select the Headset or sound device of type USB.

After setting the sound system preferences to the USB device for both Output and/or Input, your USB sound device should be enabled and functioning on your Mac

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