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Lion installed... sound dead.

Hi to all,


I recently finish my Lion upgrade, but my sound is dead!!!, When I power down my imac and restart it the boot sound works fine, but when OS starts no sound 😟


My iMac is a 3.06 Ghz Core 2 Duo with 16 Gb ram.


I make a lion upgrade from snow leopard, not a fresh install


Thanks for your help

iMac, Mac OS X (10.7)

Posted on Jul 20, 2011 11:23 AM

Reply
18 replies

Jul 20, 2011 3:21 PM in response to Colin McClelland1

Tried that but it just says "no audio devices found on system", doesn't even give me "internal speakers" option to choose. I hooked up my external audio interface for audio recording, it is indicating that there is a firewire connection established to the computer (via a blue light), but the computer can't seem to find it or anything else. Drivin me nuts! (thanks for the help)

Jul 20, 2011 4:53 PM in response to cjjones21

Good to hear that. I've had my internal speaker working fine since installing Lion - it's just the external speakers that won't work. I've tried unplugging several times as well, but nothing so far by way of sound. I'm using a Mac Pro, and the sound from the internal speaker has never been any good. If I can no longer get the fat sound from my external speakers, I guess my purchases from iTunes will diminish rapidly😟

Jul 20, 2011 11:42 PM in response to betosbar

I have an early 2011 13" MBP that works fine after upgrading to Mac OS X Lion 10.7 and a late 2009 13" MBP that has the same issue (Volume controls are greyed out) When I plug in headphones they come back, when I remove them they work, when I reboot they are greyed out again. I tried reinstalling twice, I changed several setting and deleted various cache files without any lasting effect. Where can I submit this bug? 😕

Jul 25, 2011 6:25 PM in response to roballey

I have taken a look on this issue, and this is what I think :-


1. It is not a hardware issue otherwise rolling back to 10.6.8. Will no work.


2. I saw a little metal “click” on the top of the entrance hole of audio in/out jack, a short term solution is either to insert an earphone or an optical cable and uplug it afterward, which would drive to run the audio driver.


3. Hence, I believe there is a problem only with certain model of MBP, after upgrading to Lion the software fails to “click on” the audio driver of the volume control.


Before, Apple to release the new update to fix this issue, I always insert an Tousling to mini optical adapter (without cable), which helps.


http://www.amazon.com/Toslink-To-Optical-Mini-Adapter/dp/B004T67EZK

Lion installed... sound dead.

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