Sound Output Changes on its Own

Hello tjinatlanta,

Thank you for reaching out to Apple Support Communities.

Try cleaning your headphone port using the steps found here:

Laptop computers

Learn how to clean your Mac laptop computer.

MacBook, MacBook Pro, and MacBook Air

When cleaning the outside of your MacBook, MacBook Pro, or MacBook Air, first shut down your computer and unplug the power adapter. Then use a damp, soft, lint-free cloth to clean the computer's exterior. Avoid getting moisture in any openings. Don't spray liquid directly on the computer. Don't use aerosol sprays, solvents, abrasives, or cleaners containing hydrogen peroxide that might damage the finish.

To clean the screen on your MacBook, MacBook Pro, or MacBook Air, first shut down the computer and unplug the power adapter. Dampen a soft, lint-free cloth with water only, then use it to clean the computer's screen.

To clean hard-to-remove smudges or fingerprints on the display or exterior of your Mac, you can use a cloth moistened with a 70-percent isopropyl alcohol (IPA) solution to gently wipe the display or enclosure of your Mac laptop.

More details can be found here: How to clean your Apple products

If the issue persists, it may be best to reach back out to Apple directly.

You can do so by going to Get Support

They will take a closer look and check on available options.

Cheers!

Hope you found a fix - I'm still working on mine.