tttxx
Level 1 (10 points)

Q: 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 5:55 AM

by Studio Engineer,Solvedanswer
Studio Engineer Studio Engineer
Level 2 (445 points)
A:

deluxeczech wrote:

 

I, too, am having this sound stuttering problem...and it all started after I upgraded to 10.8.  :-(    I have a 27" 3.1 GHz Intel Core i5 with 16GB of memory.  (My husband has an older 2009 model of the 27" and he is having the sound stuttering problem since ML too).  I can promise you that we had no such problems before upgrading, and are not ones to constantly install new software/games/etc.  We do both play World of Warcraft but have done so for a few years on our various Macs.  We don't listen to music or watch videos much on our desktops, so I cannot speak to other sound problems, but when playing WoW and using Ventrilo, there are occasional stuttering instances.  It is not very consistent (that is, always does it during X or Z).  In fact, using Ventrilo tonight and had no problems, but a week ago experienced stuttering when someone else was talking. 

 

I do wish Apple would AT LEAST release a statement acknowledging this issue.  We both work in IT development, so we understand that there are sometimes mystery problems that take time to troubleshoot.  NOT saying anything, however, just makes the company seem uncaring of its customers.  Personally, I would be a bit more content if I KNEW that Apple KNEW and that they were looking into it.

 

While not an ideal situation, it's good to know we are not alone in this...

 

 

Your problems will most likely be related to OS X "sandboxing" just about anything you do.... Sandboxing was supposed to be a "coherent" feature. But wound up being a total performance killa... Apple have been working on this issue a LONG time since 10.8.2.... hence them releasing more betas of 10.8.3 than (I think) any other beta OS X before that... A HUGE problem causing havoc with almost ALL 3rd pty. high performance software..

 

If you are a CRACK... You can google-search (goes beyond this here thread) ways of "overwriting" what OS X regards as "Items/processes which should be sandboxd"... To STOP this non sense...

 

We had to manually delete A LOT of files on the OS to get our system running to accommodate a pro-environment. Even "Files" that Apple forgot to delete themselves.......(Do the G-search or this thread WILL be deleted... hence me NOT going into details)

 

What COULD help you is to safe-boot ONCE and log in.. Then boot normally.. That in MANY cases will take of the problems (short-sighted-ly)... Each time you re-experience the issue... Redo aboe

 

IHTH

Posted on Mar 9, 2013 8:15 PM

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Q: Sound stuttering after Mountain Lion install

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  • by Anthonysanto,

    Anthonysanto Anthonysanto Sep 18, 2012 9:31 AM in response to dcollett.seattle
    Level 1 (0 points)
    Sep 18, 2012 9:31 AM in response to dcollett.seattle

    <Edited By Host>

  • by Morgan R,

    Morgan R Morgan R Sep 14, 2012 12:34 AM in response to Anthonysanto
    Level 2 (220 points)
    Sep 14, 2012 12:34 AM in response to Anthonysanto

    There's no need to spam, but yes, that's the audio skipping this topic refers to.

  • by Anthonysanto,

    Anthonysanto Anthonysanto Sep 14, 2012 6:35 AM in response to Morgan R
    Level 1 (0 points)
    Sep 14, 2012 6:35 AM in response to Morgan R

    Not really intended as spam.  I just spend a lot of time using my Mac to record music, listen to iTunes (which is a big part of the reason Apple is where it is today btw) and watch video.  These should be routine tasks for a computer in this day and age.  It has become obvious to many after trying numerous other solutions, that the problem lies within Mountain Lion.  Yet Apple, at least in my experience, refuses to acknowledge that there even is a problem, nor that a solution is even in the works.  It's very disappointing, and has taken much the fun out of using my Mac away.  I'm just trying to, with the help of other frustrated users hopefully, shed a little more light on the issue to expedite a fix.  I'm sorry if you feel I was spamming.

  • by FrederikY,

    FrederikY FrederikY Sep 14, 2012 10:05 AM in response to Anthonysanto
    Level 1 (0 points)
    Sep 14, 2012 10:05 AM in response to Anthonysanto

    @Anthonysanto Yes! This is exactly the problem!

  • by okitsugu,

    okitsugu okitsugu Sep 14, 2012 10:32 AM in response to tttxx
    Level 1 (0 points)
    Sep 14, 2012 10:32 AM in response to tttxx

    I found a sort of a fix.I have the Retina Macbook Pro with the same issue. If i force the dedicated graphics card to run the Audio doesn't stutter. No idea why the graphics card has anything to do with the audio stuttering but seems to work. I use the app GfxCardStatus to force which chip to be running on. Only down fall is my battery dies in like 3 hours if i run on the nvidia card the whole time.

     

    Hope apple fixes this soon..  and sorry if someone else already posted this, 15 pages was a lot to read.

  • by FrederikY,

    FrederikY FrederikY Sep 14, 2012 11:11 AM in response to okitsugu
    Level 1 (0 points)
    Sep 14, 2012 11:11 AM in response to okitsugu

    @okitsugu sorry, but we're talking about iMacs…and they don't have 2 graphic cards…unfortunately

    @chriscologne Du hast ja geschrieben, dass das 10.8.2er Update unser Problem fixt. Konntest Du inzwischen neue Erkenntnisse gewinnen?

  • by Reactor-Core,

    Reactor-Core Reactor-Core Sep 14, 2012 12:50 PM in response to FrederikY
    Level 1 (0 points)
    Sep 14, 2012 12:50 PM in response to FrederikY

    Thanks for the video example Anthony.

     

    Same problem I had on my 2011 iMac i7 @ 3.4GHz, 1GB Radeon HD 6970, 16GB RAM. Running any audio/video apps on Mountain Lion i.e. Skype, Ventrilo, World of Warcraft, Diablo III, iTunes and others would become unusable due to the audio noise, video skipping as wells as curser stuttering, skipping and jumping across the display. In fact running simple apps like Textedit I would have issues with the curser behaving erratically. Which leads me to believe 10.8 was using basic systems resources ineffectively which only became more pronounced when trying to run bigger apps, i.e. video, games, etc.

     

    My only working solution to fix this was to revert back to Mac OS 10.7 Lion after I tried everything to fix the issue, i.e. removing 3rd party apps., clean install of 10.8, zapping pram, switching RAM modules out, and remapping the solder points on the motherboard. (okay maybe I didn't re-solder the motherboard, but I thought about it).

     

    Seems like Apple is choosing to ignore this issue which I find absolutely remarkable. No response from Apple as of yet… maybe they are trying to avoid giving everyone new Macs to fix the Mountain Lion issue?

     

    All I know is I don't want a bumper cover for my iMac as a possible fix

     

    <Edited By Host>

  • by BarrettF77,

    BarrettF77 BarrettF77 Sep 14, 2012 12:57 PM in response to Reactor-Core
    Level 1 (45 points)
    Sep 14, 2012 12:57 PM in response to Reactor-Core

    I'm going to wait and see if 10.8.2 fixes the matter.  Otherwise, I've noticed increased head by about 15 degrees Celsius higher under ML and the fans are still spinning very low.  As a result, key areas on both my iMacs have now gotten stuck green subpixels that I didn't have prior to Mountain Lion.  I'll be insisting apple replace both units as damaged caused by software.  Of which I'm sure this will be a fun journey.  It's not bad right now, but it's going to get worse if it keeps torching the hardware as 10.8 evidently does. 

  • by Merls1003,

    Merls1003 Merls1003 Sep 15, 2012 1:19 AM in response to BarrettF77
    Level 1 (0 points)
    Sep 15, 2012 1:19 AM in response to BarrettF77

    10.8.2 Just received another update. Maybe this version will fix the problem.

  • by chriscologne,

    chriscologne chriscologne Sep 18, 2012 9:35 AM in response to FrederikY
    Level 1 (0 points)
    Sep 18, 2012 9:35 AM in response to FrederikY

    <Edited By Host>

  • by ArchiResearch,

    ArchiResearch ArchiResearch Sep 15, 2012 10:51 AM in response to tttxx
    Level 1 (10 points)
    Sep 15, 2012 10:51 AM in response to tttxx

    Also experiencing this widespread problem.

     

    imac 3,4ghz mid 2011, 12gb ram amd radeon 6970M. 10.8.1

     

    Did feedback. This issue MUST be resolved immediately.

  • by ArchiResearch,

    ArchiResearch ArchiResearch Sep 15, 2012 12:59 PM in response to ArchiResearch
    Level 1 (10 points)
    Sep 15, 2012 12:59 PM in response to ArchiResearch

    GUYS, i reply myself as long i found a solution to the problem (6 continous hours of playing music testing)

     

    I did disk permissions, passed Apple hardware test, and nothing of this worked.

     

     

    What i did: 1..Turn off the computer,removed the RAM, installed the 4 gb apple provided)

                     2.started the computer, ran itunes and no music glitch.

                      3.turned off the machine. Then I reinstalled the other 8 gb I bought aftermarket)

                     4. started it again.success. 2 hours of continous music :the problem has just gone for me.

     

     

    Hope this fix serves for you all. Regards, peter.

     

    i'll keep posting if it fails again.

  • by pepper_chico,

    pepper_chico pepper_chico Sep 15, 2012 2:09 PM in response to ArchiResearch
    Level 1 (0 points)
    Sep 15, 2012 2:09 PM in response to ArchiResearch

    Ok Dude, I just removed my 16GB OWC RAM and put the 4G stock RAM's back, let's see.

  • by pepper_chico,

    pepper_chico pepper_chico Sep 15, 2012 2:11 PM in response to ArchiResearch
    Level 1 (0 points)
    Sep 15, 2012 2:11 PM in response to ArchiResearch

    Ok, just got a handful of stuttering trying to play music on iTunes and even writting down this message, gonna put the OWC back.

  • by pepper_chico,

    pepper_chico pepper_chico Sep 15, 2012 2:32 PM in response to ArchiResearch
    Level 1 (0 points)
    Sep 15, 2012 2:32 PM in response to ArchiResearch

    Put my OWC back, now playing... oh, first one.

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