Try the following troubleshooting:

1. Make sure your earbuds have enough power before resetting them. Follow these steps:

      - Place the earbuds into the charging case and keep the case open. 

      - Press and hold the button on the charging case for 10 seconds until 3 LED indicators on the charging case flash white 3 times and then flash white in sequence continuously. This confirms that the reset was successful.      

2. Clear all the pairing records on your Mac computer and re-pair your earbuds. Turn the volume down one notch on your Mac computer. Make sure the volume of the Mac and the earbuds are turned up to the maximum. If you are playing music or watching a video, make sure it is turned up to the maximum as well.  

3. Use a Q-tip with a bit of rubbing alcohol to gently clean the metal mesh filter under the rubber ear tips.