No sound when connecting the Macbook Pro to ext speakers.

I have a MacBook Pro (retina, 15 ", mid-2014) running OSx 10.11.6 (El Capitan).

It has a combined audio port 1/8 "for two speakers and a microphone. The internal speakers work very well and the port works very well with a helmet. What does not work must connect external powered speakers like the computer speakers or the port on a radio. It worked perfectly with all other computers that I have ever owned, and judging from the page linked below it should work for this computer, too, so what's the problem?

Connect your Mac to a Hi-Fi, iPod, iPad, musical instruments or loudspeakers - Apple Support

I tried it with a 1/8 "cable this single sound of the door (no tape for micro), and (when it does work), I tried to first insert an adapter that split the audio and microphone, but it does not solve the problem.

How to make this work?

I found the problem. When I plugged a cable into the headphone jack, the Mac automatically turned to the low volume - assuming I have connect headset. This is why I couldn't hear it. I open the sound applet in the system area and pushed back the volume of output to the top and voila - fixed.

Tags: Notebooks

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