So after I don't remember which update, one of those random bugs that I'm sure I'm not the only one to have, started happening and this one is really annoying. When I press my keyboard volume button, the change appears on the screen, you know, the little square with a speaker and small volume dots, but the volume of the sound itself doesn't change. So as a temporary solution I chose to have the volume control icon in the upper menu bar, but even this doesn't work. The only way I have to change the volume is to go into the preferences each time, which is of course super annoying. Anyone have a solution ? EDIT: I tried ressetting the PRAM: the problem got back even worse.