1 3 4 5 6 7 Previous Next 99 Replies Latest reply: Jul 17, 2011 2:43 PM by R C-R Go to original post Branched to a new discussion.
  • 90. Re: Constant high CPU after Security Update today
    Jeff in Madison Level 1 Level 1 (0 points)

    Greg - Thanks for the fix!

     

    Apple - This is the second time we've had to apply a fix to this problem. I rely on the battery of my powerbook to provide power for several hours, and this MRT bug cause both a great deal of heat and drained my laptop's battery quickly.  Moreover, it was nontrivial to identify the culprit.  I suspect many Apple users don't even know that they have this problem.

  • 91. Re: Constant high CPU after Security Update today
    MadMacs0 Level 4 Level 4 (3,735 points)

    Jeff in Madison wrote:

     

    Apple - This is the second time we've had to apply a fix to this problem. I rely on the battery of my powerbook to provide power for several hours, and this MRT bug cause both a great deal of heat and drained my laptop's battery quickly.  Moreover, it was nontrivial to identify the culprit.  I suspect many Apple users don't even know that they have this problem.

    Unfortunately nothing you write here constitutes a request to Apple and chances are nobody from Apple will even read it.  If you have AppleCare give them a call.  If not drop a line to feedback@apple.com.

  • 92. Re: Constant high CPU after Security Update today
    sjsherratt Level 1 Level 1 (5 points)

    Same issue here.  2nd time applying Greg's "fix".  I am getting the "exit code" 4" message everyone else is getting.  I have run the permissions fix.  There needs to be a way to tell what file is causing the problem, and a way to solve this.  Reinstalling the operating system is not acceptable.

  • 93. Re: Constant high CPU after Security Update today
    sjsherratt Level 1 Level 1 (5 points)

    feedback@apple.com does not appear to be valid.

  • 94. Re: Constant high CPU after Security Update today
    sinkrideutan Level 1 Level 1 (0 points)

    We should promote Greg and ryanmoffet1 to experts

     

     

    Found this in the system log, just in case Apple does reads this and does looks for root causes; it strengthens my opinion that this is a security tool race condition.

     

    7/7/11 6:51:35 PM    com.apple.mrt.uiagent[33363]    Mon Jul  4 18:51:35 XxxxYyyy.local MRTAgent[33363] <Warning>: 3891612: (connectAndCheck) Untrusted apps are not allowed to connect to or launch Window Server before login.
    7/7/11 6:51:35 PM    com.apple.mrt.uiagent[33363]    Mon Jul  4 18:51:35 XxxxYyyy.local MRTAgent[33363] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
    7/7/11 6:51:35 PM    com.apple.mrt.uiagent[33363]    _RegisterApplication(), FAILED TO establish the default connection to the WindowServer, _CGSDefaultConnection() is NULL.

    7/7/11 6:58:11 PM    com.apple.launchd[1]    (com.apple.mrt[385]) Exited with exit code: 4
    7/7/11 6:56:34 PM    com.apple.launchd[1]    (com.apple.mrt[38]) Exited with exit code: 4
    7/7/11 6:56:38 PM    com.apple.launchd[1]    (com.apple.mrt[355]) Exited with exit code: 4
    ....
    7/7/11 6:58:11 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 7 seconds
    7/7/11 6:58:21 PM    com.apple.launchd[1]    (com.apple.mrt[392]) Exited with exit code: 4
    7/7/11 6:58:21 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 7 seconds
    7/7/11 6:58:31 PM    com.apple.launchd[1]    (com.apple.mrt[393]) Exited with exit code: 4
    7/7/11 6:58:31 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 7 seconds
    7/7/11 6:58:42 PM    com.apple.launchd[1]    (com.apple.mrt[401]) Exited with exit code: 4

     

    Of course something freshly downloaded is "untrusted", even if it is a malware removal tool and it was downloaded from apple.com;

     

    If I have some time, I'll remove Sophos, then re-install 10.6.8 patch ad see what happens.

    But I would prefer the developers "who test everything before release" would have done this.

     

    Dirk

  • 95. Re: Constant high CPU after Security Update today
    Aaron Longchamps Level 1 Level 1 (0 points)

    If it's a race condition, do you realize how hard those are to find in testing? You can test all you want but not find a race condition until a specific, sometimes non-repeatable, situation occurs.

     

    Also, I would consider the fact that only people who are having trouble would be seeking help on this. Then there's the millions of other people who downloaded the update just fine.

     

    Lastly, operating systems are big and complex things. Things do break from time to time, no matter who wrote the code.

  • 96. Re: Constant high CPU after Security Update today
    sjsherratt Level 1 Level 1 (5 points)

    Yes, these types of issues are complicated, but I would think some detail about which file can't be removed would be do-able and the next step in solving it.  "Re-install your operating system from DVD" is not an acceptable "solution".  Also my Fortue-500 company has a web page that describes how to remove the files that are causing the MRT high CPU usage issue.  CNET had an article on it etc.  So this is not just an isolated issue that a few fringe people have experienced.  I would argue the other side that there are millions of other "silent" people who don't go on forums and message boards who are just going about their day with their CPU needle pegged by MRT.

  • 97. Re: Constant high CPU after Security Update today
    pepinlebref Level 1 Level 1 (0 points)

    I know of no one who makes a backup of the OS prior installing an update from Apple. Some of the pieces of advice found in this discussion do not seem very realistic. And spending so much time in Terminal trying to make sense of where the processor cycles evaporate reminds me so much of chasing an OS 9 virus infection.

     

    In fact, for those of us who are affected, we are experiencing much of the same symptoms as a virus infection, with the same cure:

    1. machines grinds to a halt
    2. re-install OS to alleviate problem
    3. If #2 fails, chase a wild goose with Terminal weaponry and forum hopping

     

    So for the rest of us who are not Terminal gurus, there are utilities out there that will clear MRT with one click. Search the web for Apple MRT removal tool.

     

    Isn't this a case of getting sick by mandatory vaccination?

  • 98. Re: Constant high CPU after Security Update today
    R C-R Level 6 Level 6 (14,180 points)

    sjsherratt wrote:

     

    feedback@apple.com does not appear to be valid.

    Use http://www.apple.com/feedback/macosx.html for feedback about OS X issues. That is a web page form, not an email address.

  • 99. Re: Constant high CPU after Security Update today
    R C-R Level 6 Level 6 (14,180 points)

    pepinlebref wrote:

     

    I know of no one who makes a backup of the OS prior installing an update from Apple.

    That does not mean it isn't good practice. Many experienced Mac users strongly recommend making a bootable backup of the entire startup drive prior to applying any OS update, typically using Carbon Copy Cloner or SuperDuper! to make the process as painless as possible.

     

    The reason for this is simple: the OS performs the update on itself. Any pre-existing problem with the OS, including in rarely used processes like those used only when applying updates, is likely to interfere with the update, which in turn is likely to cause even more problems in the future, including with unrelated files. In a perfect world this would never happen. But in the real one, there are things beyond either the user's or Apple's control that can modify or damage the OS.

     

    If this happens, you cannot rely on the already damaged OS to repair itself.

     

    So like it or not, in the event you are unlucky enough to have this happen to you, your only practical alternatives are to reinstall & re-update the OS or to restore from a backup. If reinstalling the OS is unacceptable to you, then make the backup. You may never need it but if you do, you will be glad you did.

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