Configure Microphone SettingsĪ common reason for Microphone not working on MacBook, Mac Mini or iMac is due to the Microphone not being properly setup or the input volume being kept at a low level.Ĭlick on Apple Logo in top-menu bar and select System Preferences in the drop-down menu. If you are trying to use an External Microphone on your MacBook or Mac Mini, the problem is usually due to the Microphone not being recognized by your computer. If the Microphone on your MacBook is not working, the problem could be due to various reasons, ranging from temporary software glitch to Microphone not being properly setup and other reasons.