You may think the internal mic in your MacBook Air or Pro 'sounds okay' for the most part. And for casual use maybe that's good enough. But if you were to listen to and compare the fidelity to any external, quality USB computer microphone plugged into your MacBook, you'd be surprised - and pleased by the difference in sound reproduction quality. Apple's internal microphones are far, far from studio grade.

Blue Tiki USB Condenser Mic

Dual Mode : Speech Or Music

Samson Go-Mic Portable USB

Cardioid or Omnidirectional Patterns

For a wide variety of recommended USB microphones for Mac desktop and MacBook laptop use, visit this site dedicated to better sounding audio capture and speech recognition on your Macintosh: http://www.mac-microphones.com