If the sound on your Mac has stopped working, there are a number of possible explanations and solutions. The first thing to check is that the sound definitely is not working. Below we'll explain what to check.

No sound on Mac? Check these things first 1. Check the volume As simplistic as it may seem, the first thing to check is that the volume hasn’t been muted intentionally. Tap the volume up (F12) key to turn up the sound level. Pro tip: If you hold down Option+Shift when you press F12 or F11 to increase or decrease the volume, it will move in smaller increments than the full step changes that occur when you use the keys on their own.

Is it an app problem? It may be that there’s no sound on your Mac because it won’t play audio in a specific app.

If, for example, you can’t hear sound from a video in Safari, make sure the audio isn’t muted, by clicking the volume control in the video. You should also check other sound sources, like iTunes and QuickTime movies to find out if they can play sound. Tip: if you’re fed up with websites you visit automatically playing video with sound when you’re working, go to Safari>Preferences and click the Websites tab. Click Autoplay, and in the bottom right of the window, choose Stop Media with Sound. Check for hardware issues Next, check there’s nothing plugged into the headphone/line out port and look to see if there’s a red light on that port.

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If there is, it could be there’s a problem with the port, or something blocking it. Try blowing on it to clear dust, if that’s the case. Are you running the latest version of macOS? If there’s still no sound on your Mac, Apple’s advice is that the first thing you should do is make sure you’re running the latest version of macOS. To check which version of macOS your Mac is running, click the Apple menu and then About this Mac.

The window that opens will have the name of the version of macOS currently installed at the top. Now the latest version is macOS High Sierra. If you’re not running High Sierra, you should consider installing it by going to the App Store app, and clicking on it in the sidebar on the right hand side of the main window. If you don’t want to install High Sierra, at least make sure you’re running the latest update to whichever version of the OS is installed.

To check that, click Software Update in the About this Mac window. That will check for updates and let you know if there’s one available. If there is, install it. Before you install either a new version of the OS or an update,, or whichever backup tool you normally use. Run Maintenance scrips If you’ve determined your Mac’s sound definitely isn’t working, consider running ’s Maintenance scripts. These optimize the performance of your Mac by running a number of routines such as repairing disk permissions, verifying your startup disk, and rebuilding the launch services database.

Here's how to run Maintenance scrips: Download CleanMyMac X (it's free to download). • Launch the app. • Click Maintenance. • Choose Run Maintenance Scripts and click Run. How to check your sound settings If you’re running the latest version of macOS and your sound still isn’t working, the next step is to check your Sound settings. • Click on the Apple menu and choose System Preferences. • Click on the Sound pane.