How Do I Turn Off The Popping Sound When Adjusting Volume On A Mac?
If your Mac is currently making a sound when you adjust the volume, trying holding the shift key while pressing volume up or down. The alert sound should go away.
The sound effect can be permanently disabled via the Mac System Preferences. Open the System Preferences app (click on the Apple at the top left of your screen to find it), then select the Sound panel. Click on the Sound Effects tab and uncheck the box that says "Play feedback when volume is changed". You should no longer hear any audible feedback when adjusting the volume.