Keyboard Maestro only offers to quit foreground applications (since they are quit via AppleEvents).
coreaudiod is a background only application.
You can probably use the shell command killall
to kill it.
But since the process is not owned by you, you need
sudo killall coreaudio
And since you don't want to type your password in each time, you need to add the following line to your /etc/sudoers file:
username ALL= NOPASSWD: /usr/bin/killall coreaudiod, !/usr/bin/killall coreaudiod *
(replace “username” with your username on your Mac).
And you should not do any of this without understanding what sudo
, sudoers
and killall
do, as this is all low level stuff that is somewhat dangerous and/or security risks.