Very low volume when headphone is connected to my Macbook pro, even if at max. Headphone works correctly on my iphone and other devices. Tried Audio MIDI setup, settings seem to be correct 44.1KHz 2ch-16 bit. Can anyone help me?

  • What about system preferences,sound, then output.
    – rclyde
    Dec 15, 2012 at 21:32
  • 1
    Have you rebooted yet? Seems obvious, but this fixes a whole lot of audio issues.
    – sofly
    Feb 8, 2013 at 17:59

2 Answers 2


In audio Midi setup, change the "2ch-16bit" setting that you mentioned to either the 32 or 24bit option. The hissing should then be gone.


I had the same problem, but it fixed itself when I just simply restarted my macbook. Hope this helps!

  • This fixed it for me, so.. feels wrong to downvote. Try a reboot! Jul 20, 2020 at 22:23

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