Why is my MacBook Pro beeping when performing a keyboard shortcut? When using any keyboard shortcut in any application, there is a beeping sound effect that is normally played when there is an error. However, the keyboard shortcut still works normally. I am using macOS Mojave 10.14.6.
On your Mac, choose Apple menu  &gt; System Preferences, click Sound, then click Sound Effects.
Find the alert sound that is causing the issue.  When you click on it, it will play the sound effect.  In my case, every time I used the keyboard shortcut cmd-shift-p - even though it was a valid shortcut in some apps - it made the alert sound from &quot;Ping&quot;.   I muted the Output volume for &quot;Ping&quot; and that solved the issue.