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Sound stuttering after Mountain Lion install

Dear community,


after having installed OSX Mountain Lion my sound startet stuttering whenever there is rapid movement on my screen.

This includes e.g. window movement, scrolling through image loaded websites or video playback (flash player, quicktime).

A restart didn't help. I'm using stereo output, not digital.


I have connected a second monitor but the problem persists after disconnecting it. Movement on the second monitor also causes the sound to stutter.

My GPU Diode temperature is at 85°C (there is some bug that keeps the GPU under load while a second monitor is connected AFAIK), but I guess it was the same under Snow Leopard.


In Snow Leopard the sound output was always perfect even under heavy load or heavy HDD I/O.


Any ideas?

iMac (27-inch Mid 2011), OS X Mountain Lion

Posted on Jul 28, 2012 5:48 AM

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Question marked as Top-ranking reply

Posted on Jul 28, 2012 3:22 PM

I am also having this issue as well.


I opened Activity Monitor and noticed that during the stuttering, coreaudiod jumps in CPU usage, often past 5%. I have also noticed graphics lag when this occurs if I'm doing something like watching full-screen video or gaming.


I'm currently experiencing this on mid 2011 iMac 27" as well as a 24" iMac 2009 model I use at work.

1,223 replies

Jan 13, 2013 4:48 AM in response to tttxx

it is NOT just audio stuttering but also Frames being dropped in Apple's own FCPx... Since 10.8.2 our lives have been ****. Pure and simple... Our Pro Audio Software Protools HD has been having so many audio drops it is unbarable. FCPx has become almost unusable at least if you care about real time playback...


But hey... We got a lot of social networking features. That no one uses. With each upgrade of OS X, Apples rep. as a professional platform diminishes....

Jan 13, 2013 6:39 AM in response to Studio Engineer

Yes, I have to admit that Mountail Lion has been pretty much a total disaster for actual work. I started getting disk too slow errors in Logic Pro, and I'm running a system with 2 SSDs, so it's not a throughput issue. In fact, since my current machine (mid-2012 Macbook Pro) shipped with ML, I've been quite worried about whether the hardware is dodgy -- that's how bad it's been. Anyway, fingers crossed that it's not beyond repair... Though it's actually possible that the problems are too deeply rooted to be easily fixed. Hope not.

Jan 15, 2013 5:41 PM in response to dcollett.seattle

Hey, this is my fist post to the Apple thingy, and I can't believe it is something as simple as audio stuttering! But as you all have expressed, it is very, very frustrating and that's why I'm here.

Anyways!

I have tried all kinds of things to make the stuttering stop, because it's not just in iTunes for me! It's while I'm on youtube also, (except the whole screen freezes along with the audio stuttering).

The most notable thing I've tried is deleting my original user account off of my mac by creating another admin account, switching to it, then deleting the original. - I just wanted to make sure that there was nothing related to the problem connected to my user account. After that, I backed everything up and erased my laptop hard drive except for my critical OS X stuff.

I thought maybe clearing my hard drive of any clutter would be the best bet for fixing the problem.


But the problem persists.

I'm going to reinstall a fresh copy of mountain lion and see if that fixes anything.

Also, has anyone else experienced the YouTube freeze in Safari when viewing in full screen?

I think it is linked to the audio playback stuttering.

Jan 15, 2013 6:22 PM in response to 7thstring

Whoa - I'm stunned and happy to say this fixed my issues (for now at least). Mail was creating terrible stuttering in iTunes, QTime and Flash player whenever it was open, so I stopped having it open (checked mail on the iPhone). What a simple tip.


Thanks a ton 7thstring!


13" MBP mid-2009

2.53 GHz

8GB RAM

10.8.2

Jan 15, 2013 6:26 PM in response to Otrax

Otrax. Don't bother with anything further. Just wait till 10.8.3. Others have also tested it and said it resolved this issue and I would agree with them on that point. Otherwise, try and get the beta if you can. But I can tell you from my own 7 months of **** from this company that prides itself on quality, it's inexcusable that it has taken this long. Glad it is remedied, but after all the hoops that have had to be jumped through, I don't trust Apple any more.

Jan 22, 2013 8:08 AM in response to BarrettF77

I just want to check in again. Since I brought my Mac to the Apple store and they replaced the logicboard, I have had zero audio issues. It's been a few weeks of extensive testing, so I can conclude that Mountain Lion was not the culprit afterall.


I suggest others look at their hardware more closely as well, as ML may just be acting as a false positive.

Jan 22, 2013 8:15 AM in response to Lvivske

Glad it worked for you. A word to the wise though, wait until 10.8.3 is out. If you still have it, take appropriate action. Letting the genius bar screw with something like this is a last ditch resort as you open yourself to even more issues when this next update will be all that is needed.


Lost revenue from productivity because of their software inexperience is another issue entirely.

Sound stuttering after Mountain Lion install

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