Since upgrading to High Sierra (now at 10.13.6) on my Mac Pro 2012, I experience regular episodes where the process chmod eats up ~100% on all 12 cores. It happens about 15 seconds after logging in and lasts for about a minute. It then happens again later while I'm working. Of course, the computer is quite unresponsive while it lasts. In Activity Monitor I can see 12 instances of chmod using up each core.

I haven't been able to find anything with Google regarding this issue.

Can anyone help - any ideas?

System: Mac Pro 5,1 48 GB RAM 2 x 3,06 GHz 6-core Intel Xeon MacOS 10.13.6


EDIT: Having repeated boot/login while looking in Activity Monitor each time the number of chmod processes vary from 6 to 12, and other processes are (of course) also using CPU. I may have overestimated chmod usage by about 30%, the rest of CPU resources being used by the remaining processes - sorry about that. The problem remains, though.


EDIT: This is the list of entries from launchctl list that do not begin with com.apple:

620 0   com.adobe.PDApp.AAMUpdatesNotifier.5964.3198F160-6F8E-4D56-84B0-E905086713D0  
628 0   com.company.BackgroundScheduler.9044  
-   0   com.rogueamoeba.loopbackd  
593 0   de.rme-audio.RMEfirefaceUSBAgent  
616 0   com.leapmotion.Leap-Motion.5968  
-   0   label.9ZTHPRB4MV.com.soundradix.TTLWrapperAgent  
668 0   com.avid.ApplicationManagerHelper.5960  
603 0   com.acapelagroup.InfovoxiVoxUpdater  
604 0   com.avid.applicationmanager  
-   0   com.openssh.ssh-agent  
-   0   label.9ZTHPRB4MV.com.soundradix.TTLWrapperAgent.SL  
622 0   com.rogueamoeba.ScheduleHelper.9032  
-   78  com.paragon-software.ExtFS.fsnotifyagent  
595 0   de.rme-audio.firefaceAgent  
598 0   com.code42.menubar  
623 0   com.native-instruments.NIHostIntegrationAgent.5976  
629 0   com.abyssoft.teleport.5972  
-   0   com.adobe.AAM.Scheduler-1.0  
-   0   com.oracle.java.Java-Updater  
-   0   com.iconfactory.iPulse.5996  
-   0   com.paragon.updater  
601 0   com.spotify.webhelper  
615 0   jp.plentycom.boa.SteerMouse.9028  
583 0   com.prosofteng.DGMonitor  
-   0   com.Arturia.ArturiaSoftwareCenterAgent  
-   0   com.google.keystone.user.agent  
-   0   com.leapmotion.Leap-Motion  
  • chmod ? and nothing else showing. – Buscar웃 Oct 10 at 20:34
  • 1
    Can you post a screen shot of activity monitor? – Allan Oct 10 at 20:41
  • chmod Change access permissions, change mode – Buscar웃 Oct 10 at 20:53
  • it should do it only once, not repeatedly, unless you or some app changes the permissions all the time – Buscar웃 Oct 10 at 20:58
  • 1
    @Buscar웃: The problem is solved. Your idea to check what was starting 'chmod' let me to use 'lsof' to investigate. 'chmod' was working on an Avid cache in 'Library/Caches'. I deleted this cache and since then, chmod hasn't been running. So thanks for your input. – CMunk Oct 12 at 9:55

I found the solution: Using lsof in Terminal located in the utility folder, I could see that chmod was accessing an Avid cache in ~/Library/Caches which I simply deleted. Now chmod doesn't run anymore.

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  • you are welcome and well done. Maybe you can elaborate how did you find it, so others can profit form it. – Buscar웃 Oct 12 at 15:16
  • @Buscar웃: Do you think it needs more elaboration? I'm not sure what more to add. – CMunk Oct 13 at 19:56
  • We usually like bit more explanation for those who do not know how to do what you did. Maybe the list of your lsof ! and Library/Caches is not correct path. – Buscar웃 Oct 13 at 20:08
  • 1
    I understand. Thanks for correcting the path. Unfortunately, the output of lsof no longer exists, so I can't add it now. But I'll remember to do so in the future. – CMunk yesterday

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