[steve666]

Strange thing just happened. The volume level is on the highest setting and it won't let me change it. I can't lower it or mute it's basically frozen in place.

[reader50]

Are you using digital sound out? If so, that's normal. You control the volume with your receiver (or whatever component you're connecting to).

If you aren't using digital out, then kill coreaudiod. It will restart automatically. If that still doesn't do the trick, logout/login or reboot.

[steve666]

no digital sound out.
How do you kill coreaudiod

[reader50]

Activity Monitor -> show all processes

Select "coreaudiod" in the process list. Quit Process button (looks like a stop sign) -> Force Quit -> admin password.

[steve666]

Thanks.
For some reason this morning it started working again. Bizarre