windows 7 on macbook pro speakers stopped working

This should restore audio to your native Mac speakers. At the top of the window, ensure Play sound effects through is also set to your device’s speakers. While you are at it, take a look at the volume bar below and make sure that your output volume is turned up and Mute is unchecked. Try setting the sound to Internal Speakers (the name of the speakers might reflect your device, such as MacBook Pro Speakers). In this tab, you should see options for choosing a sound device. Open the System Settings app in the Dock or from the Apple icon in the menu bar, then click Sound in the sidebar. Fortunately, this problem is easy to fix.

When macOS first boots up, it sometimes does strange things when assigning speaker outputs, which can lead to radio silence. You might have tried to adjust volume controls, unplugged your speakers and plugged them back in, and tried to play media on a different device, but nothing seems to work. It doesn’t matter what video or app you pull up you get nothing. In this case, you get no sound at all from the speakers that you were using before the upgrade. This is for those of you who gladly upgraded but then found that your audio had cut out completely.

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Windows 7 on macbook pro speakers stopped working