sound won't unmute on lion 10.7.4

Discussion in 'iMac' started by serifstelar, May 31, 2012.

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  1. serifstelar, May 31, 2012
    Last edited: May 31, 2012

    serifstelar macrumors newbie

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    May 31, 2012
    #1
    hi everyone,

    this morning my computer started with the mute box checked in system preferences/sounds and it's grayed so i can't uncheck it. Songs won't start on iTunes, i tried both with the internal speakers and headphones. i hadn't do any system changes recently, i updated to 10.7.4 when it just showed up. my iMac it's a mid 2010. please help.

    thank you!
     
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  2. flatfoot, May 31, 2012

    flatfoot macrumors 65816

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    Aug 11, 2009
    #2
    Sounds like your Mac can't access the kext file for your audio chipset.

    If a simple reboot doesn't fix it, repair permissions. If that doesn't fix it either, reapply the 10.7.4 update, preferably from the combo update, which can be downloaded from Apple's website (http://support.apple.com/downloads/#10.7.4%20combo).
     
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  3. ellaimac, May 31, 2012

    ellaimac macrumors regular

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    Philippines
    #3
    Off-topic: How in the world do you put i7 on a Power Mac!?!?
     
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  4. flatfoot, May 31, 2012

    flatfoot macrumors 65816

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    #4
    Follow the link. ;)
     
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  5. Adamph, May 31, 2012

    Adamph macrumors newbie

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    #5
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  6. serifstelar, May 31, 2012
    Last edited: Jun 2, 2012

    serifstelar thread starter macrumors newbie

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    May 31, 2012
    #6

    later edit: the problem came back after resetting the SMC and PRAM, so if anyone has another solution, please help.
     
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  7. JimOHara, Oct 12, 2012
    Last edited: Oct 12, 2012

    JimOHara macrumors newbie

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    Oct 12, 2012
    #7
    sound won't unmute on lion 10.7.4

    Same thing happened on my 2010 MacBook upgraded to Mountain Lion. Read on another board that docking may resolve. I don't have a full-blown dock, but do have an external Apple keyboard. I shut down last night with the keyboard plugged in, sound muted. Started this a.m. without external keyboard; could not unmute. Plugged keyboard in and rebooted. Was able to unmute.
     
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