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Check your sound settings in Mac
https://support.apple.com/en-us/HT203186#:~:text=1%20From%20the%20Apple%20%28%3F%29%20menu%2C%20choose%20System,selected%2C%20deselect%20it%20and%20test%20...%20See%20More
Mac Sound Not Working? 7 Easy Fixes for Audio …
https://www.makeuseof.com/tag/sound-advice-fixing-common-mac-audio-problems-os-x/
If the internal speakers on your Mac aren't working ...
https://support.apple.com/en-us/HT203186
Check your sound settings First, disconnect any cables from the USB, Thunderbolt, or 3.5mm audio ports on your Mac. From the Apple menu , choose System Preferences. Click Sound. Click the Output tab, then select the built-in speakers. If you don’t see built-in speakers as an option in the Output window, contact Apple Support.
How to Fix Crackly Audio and Other Mac Sound Problems
https://www.howtogeek.com/670635/how-to-fix-crackly-audio-and-other-mac-sound-problems/
Mac sound not working? Here’s how to fix it - MacPaw
https://macpaw.com/how-to/fix-sound-on-mac
The first thing you can do to troubleshoot the issue is to reset NVRAM/PRAM. These are small parts of your Mac's memory that control sound volume, time zone, display resolution, and other settings on your Mac. To reset NVRAM/PRAM, shut down your Mac, and press Option-Command-P-R on its start-up. Release the keys after about 20 seconds.
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