If you mean using the volume up/down buttons on the Magic Keyboard, then yes. Mine stopped working (the on-screen pop-up) after 15.4, and a reboot cleared it up. When I went to 15.5, nothing has brought it back.
If you mean using the volume up/down buttons on the Magic Keyboard, then yes. Mine stopped working (the on-screen pop-up) after 15.4, and a reboot cleared it up. When I went to 15.5, nothing has brought it back.