Usually simply selecting appropriate audio output in the Sound settings of System Preferences in sufficient, but sometimes you may need to go further and toggle a physical connection in and out of the headphone jack The above two tips should restore audio and sound output to a Mac. The audio should now be playing through the Mac built-in speakers, if it’s not then return to iTunes to start playing the song again.Now pull out the headphones from the headphone port on the Mac.Open iTunes (or any music player) and starting playing music or audio.Connect headphones to the headphone jack on the Mac.If the above trick failed to return your sound and audio to a Mac, then try the next tip, which requires a set of headphones or some other speaker system: Method 2: Fix Missing Mac Audio / Sound with a Connect & Disconnect from the Mac Headphone Jack Interestingly enough, the reverse situation also can occur, where a Mac is connected to a TV and there is seemingly no audio output, at least until HDMI has been selected as the proper sound output channel. This seems to happen most often with Macs that have used HDMI output to a display or TV which has speakers. Why does this happen? It’s probably a simple bug where a different audio output channel gets selected or chosen during the installation or update process. Do note that you may need to first choose “Internal Speakers” and then select the external speaker or headphones to get the audio output to work again as intended. * If you have external speakers or headphones hooked up, you’d want to select those instead. Adjust the sound as usual, it will now work as intended.Select “Internal Speakers” as the output device*.Head to the  Apple menu and choose “System Preferences”, then select the “Sound” panel.And yes, this applies to all Macs with all forms of speakers internal, external, headphones, earbuds, etc: Here’s how to quickly fix the missing audio output on a Mac. How to Fix Audio and Sound Not Working on Mac If you have already ruled that out, proceed with the next simple troubleshooting steps.

Sometimes the Mac is simply muted, which obviously when mute is enabled the audio output will not work and sound will not play. You can toggle the mute button on a Mac keyboard or use the Sound control panel to boost audio all the way up to make sure the Mac sound volume is not on mute.

First things first: make sure the Mac audio output is enabled and that the computer is not set to be mute.

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