2 Replies Latest reply: May 12, 2013 7:21 AM by dominic23
Larysa1 Level 1 Level 1 (0 points)

My mac book pro isn't playing sound out but works when headphones are plugged in. Help! I only got it last August

MacBook Pro, Mac OS X (10.7.5)
  • Paul_31 Level 6 Level 6 (13,195 points)

    Assuming you've checked all your sound settings in System Preferences>Sound you could try a PRAM reset:


  • dominic23 Level 7 Level 7 (32,940 points)

    Hopefully one of these steps should solve the problem.

    1. System Preference > Sound > Output > Internal Speakers

        Highlight  Internal Speakers / Headphones

        Make sure Mute is not enabled.


    2. Remove the headphone.


        If you see red light in the headphone port, plug the headphone

        in and out of the port 5 or 6 times to flip the microswitch inside.

        Sound output may be stuck in the digital mode.




    3. Reset PRAM.  http://support.apple.com/kb/PH4405


    4. Reset SMC.     http://support.apple.com/kb/HT3964


        Choose the method for:

        "Resetting SMC on portables with a battery you should not remove on your own".


    5. Applications > Utilities > Audio MIDI Setup


        Audio Devices window

        Side Bar

        Click the Built-in Output.


        Under Mute any of the boxes checked? If so, uncheck it.