OSX Yosemite change sound output while headphones plugged in I've a problem which is my headphones' jack is broken into my computer. I can't hear any voice neither from headphones nor from internal speakers. 

What I need is, to hear some sound from internal speakers while my headphones' jack is broken in my computer. 

Thanks in advance..
If you have a Macbook Pro with only one jack input (no separate inputs for microphone/headphones), try alt (option) clicking the Sound Menu in the menu bar and selecting "Use Audio port for" -> Input. This way the system will think that you want to use what's plugged in as microphone and not as headphones and you will be able to use the speakers once again.