Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.


Question: Update to 10.6.8 broke my optical audio - any help?

Hi everyone,

i have just upgrade my system to 10.6.8 and everything work fine except my audio thru optical output. I have pluged Logitech Z-5500 Digital to my MacBook Pro's optical sound output and my problem now is that, when i play some HD movie vith DolbyDigital AC3 ore DTS, it plays fine but when i stop watching movie and close VLC, no other sounds play.. no itunes, no standard stereo movies ect.. it plays only AC3 od DTS sound track.. so when i want to listen some music, i must restart MBP and it plays again everything until i open again movie with 5.1 track....

any solution to fix it?

thanks in advance


MacBook Pro 15, Mac OS X (10.6.7), 4 GB RAM

Posted on

Question marked as Solved

Same here with Mac mini (Mid 2010) and Pioneer VSX-1021K!

I'm using EyeTV and TV-Stations with Dolby Digital are working just fine, but TV-Stations with stereo have no Sound!

Going back to the appleHDA.ktext from 10.6.7 solved the Problem for me!

Thanks TimeMachine!!!

Posted on

There’s more to the conversation

Read all replies

Jun 24, 2011 3:42 PM in response to Jan Nechyba In response to Jan Nechyba

Same problem here Mac Mini 2009. No stereo out after surround sources over optical out to external receiver.

Problem occurs right after update to OSX 10.6.8

Tried to change settings in sound & midi menu but only rebbot enables stereo again.

This problem is present in safari browser since i got my mac mini in 2009, after watching surround sources in itunes or vlc i have to restart safari to get stereo sound (e.g. youtube) again, but now stereo doesn't work anymore on whole OSX until reboot.

Jun 24, 2011 3:42 PM

Reply Helpful

Jun 24, 2011 10:42 PM in response to Jan Nechyba In response to Jan Nechyba

Seeing as there is no way for me to contact suport as my hardware is out of warranty (MacMini-Late 2009), I thought I'd post in here that this is also happening to me. I use it to play music from iTunes and watch videos. Now that the stereo optical out is broken and I can't roll back the update, it's useless. As others have said, DTS and AC3 is fine, but not stereo. This is BS! How was this not found in testing??? I'll now have to plug in an analouge stereo lead and give up DTS & AC3 until this is sorted. Hopefully it's not long.

I just got my MacBook bottom replaced last month and my iPhone 4 the month before. Apple used to be reliable. At least they're making billions in profit every year 😕

Jun 24, 2011 10:42 PM

Reply Helpful

Jun 24, 2011 11:53 PM in response to Jan Nechyba In response to Jan Nechyba

I'm using a Macbook Pro 17" (2008) and when I did this latest update (the one with the MacDefender fix) it broke my sound.

Digital sound works in VLC, but nothing else works. No sound in my browsers, no sound in Quicktime, no system sounds, nothing except VLC when I choose Audio Output-Built-In Output-(Encoded Output). *****.

Apple, fix this now, please.

Jun 24, 2011 11:53 PM

Reply Helpful

Jun 25, 2011 12:41 AM in response to Jan Nechyba In response to Jan Nechyba

I'm having audio issues but of a slightly different nature. Any audio output via HDMI to my Sony TV, ever since the 10.6.8 update, has been skipping every now and again. I have tried lowering sample rates and bit depth in Audio MIDI Setup app but it's really made no noticeable difference.

It's definitely software related as it was working 100% fine before the update. Yep, Apple need to get this fixed ASAP - and the issues better not be replecated in Lion.

Jun 25, 2011 12:41 AM

Reply Helpful

Jun 25, 2011 2:12 AM in response to Jan Nechyba In response to Jan Nechyba

Perian installed?

10.6.8 installed - all OK - Eyetv sound. I watched an MKV - multi channel output. After this my eyetv which is stereo (encoded as dolby surround II) by perian stopped working - silence - though something was hitting my amp - it was getting some stream but silence. Audio midi setup would crash every time I would try and open it when eyetv TV window open. Removed perian - now I have sound back in eyetv.

Perians fault? Apples fault?

Not sure - but it got it back for me.

Jun 25, 2011 2:12 AM

Reply Helpful

Jun 25, 2011 2:54 AM in response to enjayjay In response to enjayjay

hi enjayjay, removing Perian did NOT solve my problem... Stereo out is still broken after AC3/DTS passthrough...only restart will helps... I have but found some users in macrumors forum, that revert back appleHDA.kext from 10.6.7 timemachine backup and it solves their problems with audio.. But my question is, if it "safe" to replace new kext with old one? if the system will be stable or should we wait for apple update or Lion (i hope there is not the same audio driver as in 10.6.8 )

Jun 25, 2011 2:54 AM

Reply Helpful
User profile for user: Jan Nechyba

Question: Update to 10.6.8 broke my optical audio - any help?