Hi,
You likely pressed the mute button, which is usually the F10 button if the up
and down volume buttons are F11 and F12. Headphone volume is separate from
internal speaker volume, so if you turn up or down the volume on one, it does
not affect the volume of the other.
Later…
Tim Kilburn
J
I’ve got a Mac mini running Catalina, and my primary speakers are connected to
the headphone jack. The other day, I was pressing keys kind of fast, and one of
the keystrokes I did muted my headphones. I was still able to unplug them and
get output from VO so I could troubleshoot using the inter
