I do not have sound coming out of my macbook pro os x 10.8.1, but if an earphone is connected i hear the sound and there is a red light coming through the the earphone area. What is going on can you help me?
Mac Pro, OS X Mountain Lion (10.8.1)
The red light in the headphone jack means that the MacBook Pro thinks that an optical audio cable is plugged into the port. Try unplugging and replugging a headphone plug into the port several times. There is a tiny sensor inside the port that determines whether the port operates in optical or analog mode. Plugging something analog in should trigger the sensor and restore the analog signal.
If you don't feel comfortable doing this the folks at the Apple Genius Bar will be able to help.
I have no sound coming out of my macbook pro and see a red light through the earphone hole.
