Previous 1 3 4 5 6 7 Next 99 Replies Latest reply: Jul 17, 2011 2:43 PM by R C-R Go to original post Branched to a new discussion.
  • powerbook1701 Level 3 (565 points)

    "Thanks for confirming and researching what you saw."


    I did mean that as a compliment....

    I am really glad you dug into what you were seeing about the restart being needed.  I could have easily been wrong too..

  • Interz Level 1 (0 points)

    Yep also having similar problems here. Installed the update and ever since my MacBook Pro 2.66 has been locking up every 5 to 10 seconds. Tried all the usual disk permissions, verified disk etc. to no avail. I have indicators for disk usage and network activity and they were not corresponding with the lockups. Then I remembered something similar happening with an Apple 'Security' update a while back, so came back to this forum to, lo and behold, find a bunch of people with similar issues...


    So, it's a Malware Removal Tool probably causing the trouble is it? Reminds me of how Norton Antivirus used to sometimes cause more problems with people's pcs than help. Being 'protected' is not always what we require, so some of these updates should be more clear about what exactly they are up to with our systems. I would rather run my mac sin over bearing antivirus programs (I do use ClamAV however) than deal with the Sony Vaio next to me that is crippled by database updates, system scans and checking every byte of data that comes over the internet (just in case!) Windows Defender can be a pain like this too..


    So advice to the users please, so they can make informed choices about whether they want to overload their system processes with this kind of stuff, and better labelling on updates (with built in decent descriptions, not just links to web pages) pls!


    I await the fix as I'm damned if I'm spending another day backing everything up and reinstalling then updating everything, as I've just had to do this with a Windows pc...

  • Greg Mihran Level 1 (0 points)

    Interz, no need to wait and suffer, the solution (for me) took less than 10 seconds.  Take a read of the thread before your post, it's a two-step process.


    Open Utilities/Terminal, run the command to unload the process:


    sudo launchctl unload /System/Library/LaunchDaemons/


    Open Finder, select the file and Move to Trash:




    Restart.  Worked for me.



  • Interz Level 1 (0 points)

    Thanks Greg, that appears to have worked! Seems Apple in their infinite wisdom deemed this MRT tool to be more important than the free running of our systems, a presumption too often made by security conscious types. I will be reading all the security 'update' readmes before installing from now on!

  • R C-R Level 6 (17,375 points)

    Interz wrote:

    I will be reading all the security 'update' readmes before installing from now on!

    Perhaps Apple should rename "Read me" files to "No, really -- we aren't kidding. Read Me!"

  • MadMacs0 Level 5 (4,700 points)

    Topher Kessler posted this article yesterday on CNet/MacFixIt with a few recommendations for getting it to work properly or, as a last resort, disabling it in a similar manner to what has been suggested here.


    His bottom line:

    "If you decide to remove MRT without allowing it to complete its routine, be sure your system does not have any malware on it. If you have a third-party malware scanner that has been updated to identify these new malware threats, then be sure to use that to scan your system, or manually check for any installed malware on your system...."

  • Interz Level 1 (0 points)

    R C-R wrote:

    Perhaps Apple should rename "Read me" files to "No, really -- we aren't kidding. Read Me!"

    Asked for that I suppose! You have to be so careful what you say in these forums... Mind you it doesn't really even say 'readme'  it usually says something along the lines of 'for more information about this security update go to ...'


    My earlier point was that most people are far too busy (or impatient) to bother reading up on the machinations of potential vulnerabilities within pdfs (or whatever). Do You read all these? Does anyone read all those SLAs? So we have to Trust Apple to update our systems appropriately and not to go breaking them or installing the inverse equivalent of malware that does the same..


    Besides better be careful as many 'readme' files are actually the ones infected with malware in the pc sphere!

  • R C-R Level 6 (17,375 points)

    Interz wrote:

    So we have to Trust Apple to update our systems appropriately and not to go breaking them or installing the inverse equivalent of malware that does the same..

    No Mac is immune to preexisting issues that can cause problems with an update. Applying an OS update is a delicate procedure because the existing OS is updating itself. It is sometimes compared to modifying an airplane while it is in flight or performing brain surgery on yourself. One bad file used for the update procedure can cause unexpected results, as can third party additions that modify the OS in ways Apple can't anticipate.


    Of course, it is always possible that the problem is in the update itself, but when it is we expect large numbers of users to be affected. If it is something that affects only certain models, we expect fewer reports but the numbers still should be significant since there are many thousands of each model in use.


    Since the reports of this issue are not widespread, it is highly unlikely that there is anything wrong with the update that would affect all users. It may be that there is an issue that affects certain MacBookPro models, but without clear info about that we can only guess about that.


    You can help by supplying the model ID of your MBP. To get it, open System Profiler. The second line will display a model identifier like "MacBookPro7,1." It is also helpful to list any third party add-ons you might be using that modify the OS. Occasionally, update problems have been traced to that sort of thing.

  • Interz Level 1 (0 points)

    Reading through this thread it does seem to be affecting the MacBook Pro (maybe older models like mine) more than others. Here are my details, hope it can help:

    Model Identifier:          MacBookPro4,1

      Processor Name:          Intel Core 2 Duo

      Processor Speed:          2.6 GHz


    3rd party addons could include Growl, Disk LED, Dropbox and Little Snitch amongst other apps..

  • James734 Level 1 (15 points)

    Don't think it's specific to a model. More than likely, as you suggested, it's probably due to some specific configuration, migration, upgrade, ????.


    Mine for example was affected:

    Model Identifier:    MacBookPro6,2

      Processor Name:    Intel Core i5

      Processor Speed:    2.53 GHz


    But my 2nd MacBook Pro is the same model as you have and it had no issues, but it's also pretty out of box configuration. I also have a MacBook that experienced no issue. All with various 3rd party software installed. To bad there wasn't some sort of crash report that could be looked at to see why it was crashing continuous.

  • trueper Level 1 (0 points)

    Thanks Greg... this one worked... it was like my windows system for two days now ...


    whew I can breathe again


    MRT is Malware Removal Tool right ?? ... so should I install anything to

    stay protected .. anyone?? or am I fine?



  • MadMacs0 Level 5 (4,700 points)

    > MRT is Malware Removal Tool right ?? ... so should I install anything to

    > stay protected .. anyone?? or am I fine?


    Yes, that's what MRT means but works only one time when you install the update.  Sound like perhaps it did not work for you, so you might want to do a manual check if you suspect you may have installed something.


    The other components that were included in the update should now protect you against future issues, such as this, but only if you chose to keep your Safe Downloads database up-to-date.


    References to Apple documentation of all this has been cited earlier in this thread.

  • sinkrideutan Level 1 (0 points)

    Thanks for the solution, Greg and MadMacs0 !!!!


    FWIW I have Sophos  running,

    I suffered from CPU spikes caused by MRT

    Applied the disk verify and permissions repair guidelines from R C-R

    Problem persisted


    I think there is a conflict between whatever is on my system (incl MS Office and Entourage) and this MRT thingy




      Model Name:          MacBook Pro

      Model Identifier:          MacBookPro5,3

      Memory:          4 GB

      System Version:          Mac OS X 10.6.7 (10J869)

      Kernel Version:          Darwin 10.7.0

  • Interz Level 1 (0 points)

    This is interesting as I had almost immediate issues with MS Office 2008 and was not able to open Word and other apps complained. I ran an updater for Office and this seemed to fix those issues but the MRT problem persisted until I applied Greg's fix above.

  • nobbycat Level 1 (0 points)

    Thanks for the summary Greg.

    For the thread, my machine details are:


    Model Name:          MacBook Pro

      Model Identifier:          MacBookPro6,2

      Processor Name:          Intel Core i5

      Processor Speed:          2.53 GHz

      Number Of Processors:          1

      Total Number Of Cores:          2

      L2 Cache (per core):          256 KB

      L3 Cache:          3 MB

      Memory:          8 GB


    MRT constantly respawning (two hours of high - 98-100% cpu ).


    Poor poor update from apple.

    If I wanted to spend my time debugging updates, I would go back to a crappy windows machine.


    What about people (my old mum) who just use their MBP... They stand no chance of sorting this one out

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