When I have my headphone plugged into my Mac and open an application like YouTube, I can hear sound from the headphones. When I unplug the headphones, I then hear sound from the MacBook Pro speakers.
But when I plug the headphones in again, I still hear sound from the Mac speakers! Not from the headphones!
In Sound Setting I can see that the output Device is set as External Headphones, but the sound is coming from the Mac speakers!
I am so confused! Any idea how to get sound back to the headphones?