Page 2 of 2 FirstFirst 12
Results 16 to 20 of 20
  1. #16
    Slow Mac Book Air, high system cpu usage
    Stretch's Avatar
    Member Since
    Jan 13, 2007
    Location
    Central New York
    Posts
    4,773
    Specs:
    15in i7 MacBook Pro, 8GB RAM, 120GB SSD, 500GB HD
    Quote Originally Posted by vansmith View Post
    In the box that says "My Processes", change that to "System Processes."
    Or better yet, All Processes.
    Blog and Photo Gallery: http://philolin.me/

    Currently running OS X 10.10

  2. #17
    Slow Mac Book Air, high system cpu usage
    vansmith's Avatar
    Member Since
    Oct 19, 2008
    Location
    Toronto
    Posts
    19,395
    Specs:
    2012 13" MBP (2.5 i5, 8GB)
    Quote Originally Posted by Stretch View Post
    Or better yet, All Processes.
    True, that will work. I was hoping that the system process list would make it easier for us since this seems to be a problem with system processes.
    Important Links: Community Guidelines : Use the reputation system if you've been helped.
    M-F Blog :: Write for the blog
    Writing a Quality Post

  3. #18
    Slow Mac Book Air, high system cpu usage

    Member Since
    Mar 22, 2012
    Posts
    8
    Kernal usage high
    As you can see from your help I determined the kernal CPU usage was extremely high. I opened up the console and determined that a program NasNavigator was spitting out a ton of messages. This is a program that scans the network for a Buffallo Drive. The mac already had a connection setup to their share drive with SMB so I uninstalled the program. After rebooting it was still spitting out messages in the console. I rebooted to safe mode and did a search on the entire mac for any file that started with "nas" or "nav" and deleted them. Rebooted to normal mode still seeing the messages. Any suggestions?
    Attached Images Attached Images

  4. #19
    Slow Mac Book Air, high system cpu usage
    vansmith's Avatar
    Member Since
    Oct 19, 2008
    Location
    Toronto
    Posts
    19,395
    Specs:
    2012 13" MBP (2.5 i5, 8GB)
    kernel_task is a "representation" of the kernel which is responsible for low level operation of the OS. As such, it's not the kernel per se that is causing issues but something that is continually making system calls to it.

    A quick search suggests that NAS software is notorious for causing this. I'd suggest that you reinstall the software and uninstall it using the prescribed steps (you seemed to suggest that you did this manually).
    Important Links: Community Guidelines : Use the reputation system if you've been helped.
    M-F Blog :: Write for the blog
    Writing a Quality Post

  5. #20
    Slow Mac Book Air, high system cpu usage

    Member Since
    Mar 22, 2012
    Posts
    8
    Reinstall of OS
    So I uninstalled the program and errors went away in the console. However, The CPU usage problem still hasn't gone away.

    Apple recommended doing the following.

    Backup time machine to an external HD
    Boot into repair HD and erase disk
    Reinstall OS from repair HD
    Perform Time Machine restore

    Do you think this would work and would I still have my files and programs?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. High CPU Usage
    By farshadavocate in forum OS X - Operating System
    Replies: 21
    Last Post: 06-01-2015, 12:18 PM
  2. iMac Air High CPU Usage While Idle / Kernel Issues
    By iRescue911 in forum Apple Notebooks
    Replies: 8
    Last Post: 03-22-2014, 01:07 AM
  3. high cpu usage
    By markyb in forum OS X - Operating System
    Replies: 3
    Last Post: 08-04-2012, 05:09 PM
  4. High CPU usage
    By farshadavocate in forum Switcher Hangout
    Replies: 6
    Last Post: 10-23-2011, 08:45 AM
  5. High Heat + High CPU Usage = Slow and Laggy
    By halo200 in forum Apple Notebooks
    Replies: 6
    Last Post: 03-26-2008, 12:14 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •