Some microphones can connect to the USB port on your Mac. A USB microphone will be easier to use because your Mac will automatically recognize it and select the USB mic as your primary recording source. If your external microphone connects to the regular analog microphone jack — and your Mac already has a built-in mic — you may find that iMovie doesn’t recognize your external microphone. To correct this problem, you must adjust your system’s Sound settings:
- Open the System Preferences window by choosing Apple➪System Preferences.
- Double-click the Sound icon to open the Sound preferences dialog box.
- Click the Input tab to bring it to the front.
- Open the Microphone pull-down menu and choose External Microphone/Line In.
- Press Ô+Q to close the Sound dialog box and System Preferences.
Your external microphone should now be configured for use in iMovie
