I know this has been posted before I'm looking for some solid solutions anyone might have. The problem is simple, I want to change the volume of the music/video I'm playing so I hit the appropriate volume button on my keyboard and the volume symbol pops up along with a circle with a line through it showing that the volume can't be adjusted. Please advise!
A Safe Mode boot deletes system caches that may help.
Top left corner of your screen click the Apple > Shut Down.
After your Mac shuts down, wait 10 seconds, then press the power button.
Immediately after you hear the startup tone, hold down the Shift key. You should press the Shift key as soon as possible after you hear the startup tone, but not before.
Release the Shift key when you see the gray Apple logo and progress indicator.
Once you are in Safe Mode, go back to the Apple menu. From the drop down menu click: Restart
Then try the volume keys.
About Safe Mode
Hey Apple, any reason why every update makes the volume keys stop working on my MacBook Pro? Uncool guys, uncool!
