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Q: El Capitan, No sound (No output devices found)

Hi guys! This is my first post so be kind.

 

I'm using a MacBook Pro (Retina, 13-inch, Mid 2014), 2.6 GHz Intel Core i5, 8 GB 1600 MHz DDR3.

 

Been having this "No output device found" problem since updating to El Capitan 10.11. I don't know if it's a software or hardware issue. I haven't really tried much but read some articles on Google. So i decided to wait for the next update which might fix the problem but no, i just updated to 10.11.1 30 mins ago and still no audio. In boot up i would hear the Mac boot up sound with a little cracking like noise but after i log in, all sound from internal speakers is gone. I've tried plugging my headphones in the AUX jack but still no sound. Hope someone can help. Cheers!

 

This is what it looks like in the System preferences > Sound :

Screen Shot 2015-10-23 at 3.33.29 PM.png

 

This is what it looks like when i press the volume up (F11) and volume down (F12) button :

Screen Shot 2015-10-23 at 3.34.10 PM.png

MacBook Pro, OS X El Capitan (10.11.2)

Posted on Dec 11, 2015 9:26 AM

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Q: El Capitan, No sound (No output devices found)

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  • by Richard Segedi,

    Richard Segedi Richard Segedi Dec 11, 2015 10:04 AM in response to Tengking
    Level 4 (1,079 points)
    Dec 11, 2015 10:04 AM in response to Tengking

    Have you tried resetting the SMC yet?  If not, here's how for a MacBook Pro"

     

    MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009).

    1. Shut down the computer.
    2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
    3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
    4. Release all the keys and the power button at the same time.
    5. Press the power button to turn on the computer.
    6. Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.

     

    I had an issue with one of my USB 3 ports and the reset solved it.

     

    Here's a full article on the process and what it does.

     

    Resetting the System Management Controller (SMC) on your Mac - Apple Support

     

    Rick

  • by Linc Davis,

    Linc Davis Linc Davis Dec 11, 2015 12:24 PM in response to Tengking
    Level 10 (207,926 points)
    Applications
    Dec 11, 2015 12:24 PM in response to Tengking

    There are many possible reasons for sound output to fail. Please take each of the following steps that you haven't already tried. Some may not apply to your model. Stop when the problem is resolved.

    Back up all data before making any changes.

    1. Start with the steps recommended in this support article. Don't skip any of the steps. It's the starting point for further efforts to solve the problem.

    2. Make sure you have a fully up-to-date installation of OS X.

    3. If you've installed an application called "Memory Clean" or any other third-party software that is supposed to "clean" or "purge" memory automatically, remove it according to the developer's instructions and restart. You should do that even if the software is not causing the problem, because it's useless.

    4. Other third-party software that has been reported to interfere with sound output includes "Boom" and "Samsung Kies." If applicable, uninstall according to the developer's instructions (not by dragging something to the Trash.)

    5. If an AirPlay device is selected for sound output from iTunes (or from other applications via third-party software such as "Airfoil"), deselect it.

    6. Launch the application "Audio MIDI Setup" by entering the first few letters of its name in a Spotlight search and selecting it in the results (it should be at the top.) Select Built-in Output from the list on the left. If the Mute boxes are checked, uncheck them.

    7. If a red light is visible in the audio-out port when sound should be playing, the internal switch is stuck in the position for digital output. You may be able to free it by inserting and removing a mini-stereo jack of the proper size. If not, the machine needs to be serviced. Inserting any kind of tool in the port may cause damage that won't be covered by the warranty.

    If there's no red light, the switch may still be stuck in the headphone position. Try to free it the same way.

    8. Disconnect all wired peripherals except keyboard and mouse, if applicable. If more than one display is connected, disconnect all extra ones. Restart and test.

    9. If you have a MacBook Air, turn off Bluetooth and restart.

    10. Start up in safe mode. Don't log in; just restart as usual when the login screen appears. When you do, make sure the words "Safe Boot" do not appear in the login screen. If they do, the system is still in safe mode and sound won't work.

    11. Reset the NVRAM.

    12. Reset the SMC.

    13. Triple-click anywhere in the line below on this page to select it:

    /Library/Preferences/Audio

    Right-click or control-click the highlighted line and select

              Services Reveal in Finder (or just Reveal)

    from the contextual menu.* A folder should open with an item selected. Move the selected item to the Trash. You may be prompted for your administrator login password. Restart the computer and empty the Trash. Recreate your settings in the Sound preference pane.

    *If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination  command-C. In the Finder, select

              Go Go to Folder...

    from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.

    14. Reinstall OS X after backing up all data.

    15. Make a "Genius" appointment at an Apple Store.

  • by ahaynes4,

    ahaynes4 ahaynes4 Feb 17, 2016 5:07 PM in response to Tengking
    Level 1 (0 points)
    Feb 17, 2016 5:07 PM in response to Tengking

    This is a known bug in OS X El Capitan. Many users have complained of not being able to control their volume through any external audio interface. See here and here. I can't believe Apple has gotten away with not fixing this for so many months. It has completely ruined my video editing setup.

  • by bfenster,

    bfenster bfenster Jul 30, 2016 12:34 PM in response to ahaynes4
    Level 1 (4 points)
    Jul 30, 2016 12:34 PM in response to ahaynes4

    Any update to this? I am having the same issue, and sadly have done everything suggested to no avail.

     

    Brian

    MBPretina 2013, El Cap