ddscouser Said:
"usb microphone not listed in sound preferences: Plugged a usb microphone into macbook air, but it is not showing up in the sound preferences. The only input listed is the internal/built-in mic. Tried resetting the PRAM, booting in safe mode, using a different log-in account, but no dice."
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Verify Compatibility:
What is the model? - View the manufacturer's Web site, and see if it is compatible with your MacBook Air and its operating system. If it is, you may need to download drivers. Use the "Contact us" link, located somewhere in their homepage.
Get Driver from Manufacturer:
Be certain to get the driver from the manufacture and none other. Elsewise, it could be malware or spyware that you end up installing.