No sound??

Discussion in 'OS X Yosemite (10.10)' started by white.noise, Jul 10, 2014.

  1. white.noise, Jul 10, 2014
    Last edited: Jul 10, 2014

    white.noise macrumors member

    Jun 6, 2011
    I upgraded to DP3 on my iMac, and after the update my mac doesn't recognize any form of audio output. The speakers work, because the mac chime plays on bootup, but even when headphones are plugged into the audio jack, it won't recognize them. I even went into the setting pane to see if i could do anything but it show no output devices. Can someone help?
  2. Manic Harmonic macrumors 6502

    Dec 4, 2011
    Can you see if Apple hda is loaded? Type this into the terminal:
    kextstat | grep HDA

    If it's not loaded, then repair disk permissions and do this:
    sudo kextcache -system-prelinked-kernel && sudo kextcache -system-caches
  3. funkahdafi macrumors 6502

    Mar 16, 2009
    Planet Earth, Old World
    If you had Rogue Amoeba's Airfoil installed prior to the upgrade, than that is your issue. Delete the instant.on sound driver from the system, and your sound will immediately work (without reboot).

Share This Page