HalexPereira

Q: kernel_task is using 100% CPU when waking from sleep

Since updating my 13" mid-2013 MacBook Air to Mavericks, there's this issue that's been happening when I wake the computer up from sleep. A proccess called kernel_task uses 100% CPU (a whole core) and hangs there until the computer is restarted. This doesn't make the computer unresponsive, but it kills battery life.

 

So far, I've tried the following:

 

1. Resetting SMC, NVRAM and PRAM: no effect.

2. Safe Boot: the issue doesn't happen.

3. Deleting old apps/plugins: issue persists.

4. Closing all apps doesn't solve issue after it takes place.

5. Repairing permissions: no effect.

6. Apple Diagnostics: no issue found in hardware.

7. No kernel extensions from third-parties are installed (there are 120 kext, according to Terminal, but they all come from Apple).

8. Everything is up to date.

9. Only external plugin installed is Flash.

 

Given these, I reckon it's something software-related. Any tips on solving this would be welcome — things to look for in Console logs would be greatly appreciated.

MacBook Air (13-inch Mid 2013), OS X Mavericks (10.9)

Posted on Oct 28, 2013 12:03 PM

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Q: kernel_task is using 100% CPU when waking from sleep

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  • by HalexPereira,

    HalexPereira HalexPereira Feb 26, 2014 6:41 AM in response to akimfr
    Level 1 (1 points)
    Feb 26, 2014 6:41 AM in response to akimfr

    Indeed. I tried to reproduce the issue today on 10.9.2 and it was gone!

     

    Not to be overly optimistic, I'd give it a few days before displaying fireworks. Prospects look good, though.

  • by saurav rungta,

    saurav rungta saurav rungta Feb 26, 2014 9:19 PM in response to HalexPereira
    Level 1 (0 points)
    Feb 26, 2014 9:19 PM in response to HalexPereira

    yup its finally solved in 10.9.2

    rMBP late 2013

  • by Nudelholz,

    Nudelholz Nudelholz Feb 27, 2014 2:48 AM in response to HalexPereira
    Level 1 (0 points)
    Feb 27, 2014 2:48 AM in response to HalexPereira

    It seems to be solved for me, too.

     

    (MBA 2013 13", 10.9.2.)

     

    I tried everything that caused that problem previously and everything works fine

  • by Zack Holmes,

    Zack Holmes Zack Holmes Feb 27, 2014 10:55 AM in response to HalexPereira
    Level 1 (19 points)
    Feb 27, 2014 10:55 AM in response to HalexPereira

    17" macbook pro mid 2011 experiencing memory leak, not exactly as described, but memory leak nonetheless with kernal task using 2-300% of cpu... fixed as of 10.9.2 (so far). thank god. 10.9.2 actually feels like the first stable release of mavericks.

     

    now to just get apple remote desktop fixed....

  • by Anorax1,

    Anorax1 Anorax1 Feb 27, 2014 12:38 PM in response to Zack Holmes
    Level 1 (0 points)
    Feb 27, 2014 12:38 PM in response to Zack Holmes

    Sad to say after two days of being ok after the 10.9.2 update my Macbook Air is once again suffering battery draining issues and the kernel_task 100% issue. Unfortunately if I can't trust my MBA to stay in sleep mode with the cover closed I am going to be forced to shut it down every day which kind of defeats the whole purpose of "instant on" access to my MBA.

     

    Thanks Apple. I really wish I had not updated from 10.8.6 to Mavericks. 10.8..6 was working perfectly.   ><

  • by kuerbiskopf,

    kuerbiskopf kuerbiskopf Feb 27, 2014 12:42 PM in response to Anorax1
    Level 1 (2 points)
    Feb 27, 2014 12:42 PM in response to Anorax1

    well you are making me paranoid. Mine is working fine since 10.9.2.

  • by Anorax1,

    Anorax1 Anorax1 Feb 27, 2014 1:02 PM in response to kuerbiskopf
    Level 1 (0 points)
    Feb 27, 2014 1:02 PM in response to kuerbiskopf

    I just checked my syslog and noticed there were wake events occurring during the whole night while my MBA was in sleep mode. I also noticed after the 10.9.2 patch the PowerNap option had turned itself back on. I have now turned off the PowerNap and deleted and recreated my power management PLIST file and recreated it. Hopefully this will now fix the issue.

  • by david_hay,

    david_hay david_hay Feb 28, 2014 11:58 AM in response to HalexPereira
    Level 1 (0 points)
    Feb 28, 2014 11:58 AM in response to HalexPereira

    So, the 10.9.2 fix appears to have resolved the kernel_task problem ( for me, the answer was to quit iTunes ), and I know we've also had an iTunes update in the past few days.

     

    Sadly, I'm now seeing a few problems with the MacBook Pro with Retina Display failing to resume after suspend ( wake up ).

     

    I got a Crash Report: -

     

    Date/Time:       2014-02-28 06:18:01 +0000

    OS Version:      10.9.2 (Build 13C64)

    Architecture:    x86_64

    Report Version:  18

     

    Event:           Sleep Wake Failure

    Steps:           0

     

    Hardware model:  MacBookPro10,1

    Active cpus:     8

     

    ================================================================

    Code: 0x13006c00                                                                                  

    Model: MacBookPro10,1, BootROM MBP101.00EE.B02, 4 processors, Intel Core i7, 2.3 GHz, 16 GB, SMC 2.3f36

    Graphics: Intel HD Graphics 4000, Intel HD Graphics 4000, Built-In, 1024 MB

    Graphics: NVIDIA GeForce GT 650M, NVIDIA GeForce GT 650M, PCIe, 1024 MB

    Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x484D5434314753364D465238432D50422020

    Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x484D5434314753364D465238432D50422020

    AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xEF), Broadcom BCM43xx 1.0 (5.106.98.100.22)

    Bluetooth: Version 4.2.3f10 13477, 3 services, 15 devices, 1 incoming serial ports

    Network Service: Wi-Fi, AirPort, en0

    Serial ATA Device: APPLE SSD SM256E, 251 GB

    USB Device: Hub

    USB Device: FaceTime HD Camera (Built-in)

    USB Device: Hub

    USB Device: Hub

    USB Device: Apple Internal Keyboard / Trackpad

    USB Device: BRCM20702 Hub

    USB Device: Bluetooth USB Host Controller

    Thunderbolt Bus: MacBook Pro, Apple Inc., 23.4

     

    earlier, and have sent that off to Apple.

     

    Let's see what comes next ....

  • by Anorax1,

    Anorax1 Anorax1 Mar 2, 2014 3:29 PM in response to Anorax1
    Level 1 (0 points)
    Mar 2, 2014 3:29 PM in response to Anorax1

    Ok the kernel_task 100% issue seems to have disappeared. The wake requests with cover closed are still occurring though. The battery isn't draining as bad as before but it still drained to 80% of zero usage over the weekend. 10.8.6 did not have this issue.

     

    So something is still waking up the Air but without detail it is very hard to know what that is. I assume there is an active program installed with Mavericks that is checking the network at regular intervals. The trick is finding the culprit.

     

    Mar  1 00:00:15 MacBook-Air kernel[0] <Debug>: Wake reason: ?

    Mar  1 00:00:57 MacBook-Air kernel[0] <Debug>: Wake reason: ?

    Mar  1 00:01:37 MacBook-Air kernel[0] <Debug>: Wake reason: ?

    Mar  1 00:02:14 MacBook-Air kernel[0] <Debug>: Wake reason: ?

    Mar  1 00:02:52 MacBook-Air kernel[0] <Debug>: Wake reason: ?

     

    The above is an extract of the wake events.

  • by Anorax1,

    Anorax1 Anorax1 Mar 3, 2014 12:49 PM in response to Anorax1
    Level 1 (0 points)
    Mar 3, 2014 12:49 PM in response to Anorax1

    Ok woke up this morning and noticed my Macbook Air fan was running 100% and my Mac was basically cooking itself inside my laptop cover. Enough is enough. I am going to do a full clear and reinstall of Mavericks to try and stop this major issue which to be honest has now become a health hazard especially if it cooks so badly the Air battery explodes. I am so f..king annoyed with myself that I went ahead and upgraded what was a perfectly working Air under Mountain Lion to this abomination called Mavericks.

  • by miktenholt,

    miktenholt miktenholt Mar 7, 2014 12:40 AM in response to HalexPereira
    Level 1 (0 points)
    Mar 7, 2014 12:40 AM in response to HalexPereira

    I have sort of the same problem. I am not sure if kernel_task uses 100% of the CPU of my MBP.. Right now it doesn't is just uses around 3% (maybe because i just restarted my laptop), but my laptop is remarkably slow after installing Mavericks. I did'nt had this problem before. Before installing Mavericks I could easely run a few applications without having any speed problems. I recently installed Adobe CS6 aswell and I am only using Photoshop wich shouldn't take that much of my CPU.

     

    Could someone take a look?

     

    Hardware Information:

              MacBook Pro (15-inch, Early 2011)

              MacBook Pro - model: MacBookPro8,2

              1 2 GHz Intel Core i7 CPU: 4 cores

              4 GB RAM

     

    Video Information:

              Intel HD Graphics 3000 - VRAM: 384 MB

              AMD Radeon HD 6490M - VRAM: 256 MB

     

    System Software:

              OS X 10.9.1 (13B42) - Uptime: 0 days 0:16:20

     

    Disk Information:

              TOSHIBA MK5065GSXF disk0 : (500,11 GB)

                        EFI (disk0s1) <not mounted>: 209,7 MB

                        Macintosh HD (disk0s2) / [Startup]: 499,25 GB (191,31 GB free)

                        Recovery HD (disk0s3) <not mounted>: 650 MB

     

              MATSHITADVD-R   UJ-898 

     

    USB Information:

              Apple Inc. FaceTime HD Camera (Built-in)

     

              Apple Inc. Apple Internal Keyboard / Trackpad

     

              Apple Inc. BRCM2070 Hub

                        Apple Inc. Bluetooth USB Host Controller

     

              Apple Computer, Inc. IR Receiver

     

    FireWire Information:

     

    Thunderbolt Information:

              Apple Inc. thunderbolt_bus

     

    Configuration files:

              /etc/hosts - Count: 15

     

    Kernel Extensions:

              com.iospirit.driver.rbiokithelper          (1.21 - SDK 10.6)

     

    Launch Daemons:

              [System] com.adobe.fpsaud.plist 3rd-Party support link

              [System] com.adobe.SwitchBoard.plist 3rd-Party support link

              [System] com.iospirit.candelair.daemon.plist 3rd-Party support link

              [System] com.iospirit.candelair.sync.plist 3rd-Party support link

              [System] com.microsoft.office.licensing.helper.plist 3rd-Party support link

              [System] com.parallels.desktop.launchdaemon.plist 3rd-Party support link

              [System] com.realvnc.vncserver.plist 3rd-Party support link

              [System] com.teamviewer.teamviewer_service.plist 3rd-Party support link

     

    Launch Agents:

              [System] com.adobe.AAM.Updater-1.0.plist 3rd-Party support link

              [System] com.parallels.desktop.launch.plist 3rd-Party support link

              [System] com.parallels.DesktopControlAgent.plist 3rd-Party support link

              [System] com.parallels.vm.prl_pcproxy.plist 3rd-Party support link

              [System] com.realvnc.vncserver.peruser.plist 3rd-Party support link

              [System] com.realvnc.vncserver.prelogin.plist 3rd-Party support link

              [System] com.teamviewer.teamviewer.plist 3rd-Party support link

              [System] com.teamviewer.teamviewer_desktop.plist 3rd-Party support link

     

    User Launch Agents:

              [not loaded] com.adobe.AAM.Updater-1.0.plist 3rd-Party support link

              [not loaded] com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist

              [not loaded] com.facebook.videochat.[redacted].plist 3rd-Party support link

              [not loaded] com.google.keystone.agent.plist 3rd-Party support link

              [not loaded] com.spotify.webhelper.plist 3rd-Party support link

              [not loaded] com.zeobit.MacKeeper.Helper.plist 3rd-Party support link

     

    User Login Items:

              Spot Remote Server

              smcFanControl

              iTunesHelper

              smcFanControl

              Spotify

              RightZoom

     

    Internet Plug-ins:

              Flip4Mac WMV Plugin: Version: 2.4.4.2 3rd-Party support link

              FlashPlayer-10.6: Version: 12.0.0.70 - SDK 10.6 3rd-Party support link

              iPhotoPhotocast: Version: 7.0 - SDK 10.8

              Flash Player: Version: 12.0.0.70 - SDK 10.6 3rd-Party support link

              AdobePDFViewer: Version: 10.1.1 3rd-Party support link

              Default Browser: Version: 537 - SDK 10.9

              NP_2020Player_IKEA: Version: 5.0.7.0 3rd-Party support link

              QuickTime Plugin: Version: 7.7.3

              SharePointBrowserPlugin: Version: 14.1.0 3rd-Party support link

              Silverlight: Version: 5.1.10411.0 - SDK 10.6 3rd-Party support link

              JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Outdated! Update

     

    Audio Plug-ins:

              BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9

              AirPlay: Version: 1.9 - SDK 10.9

              AppleAVBAudio: Version: 2.0.0 - SDK 10.9

              iSightAudio: Version: 7.7.3 - SDK 10.9

     

    iTunes Plug-ins:

              Quartz Composer Visualizer: Version: 1.4 - SDK 10.9

     

    3rd Party Preference Panes:

              Flash Player  3rd-Party support link

              Flip4Mac WMV  3rd-Party support link

              Growl  3rd-Party support link

     

    Old Applications:

              DockPlistEdit:          Version: 7.0 - SDK 10.5 3rd-Party support link

                        /Library/Parallels/Uninstaller/Parallels Hypervisor/DockPlistEdit.app

              SLLauncher:          Version: 1.0 - SDK 10.5 3rd-Party support link

                        /Library/Application Support/Microsoft/Silverlight/OutOfBrowser/SLLauncher.app

              Wondershare Helper Compact:          Version: 2.2.6.0 - SDK 10.5 3rd-Party support link

                        /Applications/Wondershare Helper compact/Wondershare Helper Compact.app

              SA Color Finesse 3 UI:          Version: 3.0.6(275) - SDK 10.5 3rd-Party support link

                        /Applications/Adobe After Effects CS6/Plug-ins/Effects/Synthetic Aperture/(CF3 Support)/SA Color Finesse 3 UI.app

              dynamiclinkmanager:          Version: 6.0.0 - SDK 10.5 3rd-Party support link

                        /Library/Application Support/Adobe/Common/dynamiclink/CS6/dynamiclinkmanager.app

              Wondershare Helper Compact:          Version: 2.2.6.4 - SDK 10.5 3rd-Party support link

                        /Users/[redacted]/Library/Application Support/Helper/Wondershare Helper Compact.app

              dynamiclinkmediaserver:          Version: 6.0.0 - SDK 10.5 3rd-Party support link

                        /Library/Application Support/Adobe/Common/dynamiclinkmediaserver/1.0/dynamiclinkmediaserver.app

              Remote Buddy:          Version: 1.22 - SDK 10.4 3rd-Party support link

     

    Time Machine:

              Time Machine not configured!

     

    Top Processes by CPU:

                   3%          WindowServer

                   2%          EtreCheck

                   2%          Activity Monitor

                   1%          sysmond

                   0%          netbiosd

     

    Top Processes by Memory:

              143 MB          com.apple.IconServicesAgent

              135 MB          Google Chrome

              90 MB          mds_stores

              82 MB          Spotify

              61 MB          WindowServer

     

    Virtual Memory Information:

              1.04 GB          Free RAM

              1.52 GB          Active RAM

              524 MB          Inactive RAM

              947 MB          Wired RAM

              430 MB          Page-ins

              0 B          Page-outs

     

    Thanks.

  • by sleerssen,

    sleerssen sleerssen Mar 13, 2014 8:27 AM in response to kanedaboy
    Level 1 (0 points)
    Mar 13, 2014 8:27 AM in response to kanedaboy

    I've been having the same issue and just stumbled across this post.  I unplugged my headset and, just as everyone else describes, kernel_task stops growing, and it is slowly shrinking now.  I can not imagine why it has not been addressed in the latest update (I'm running 10.9.2).

  • by Tuffy422,

    Tuffy422 Tuffy422 Mar 18, 2014 5:12 AM in response to HalexPereira
    Level 1 (0 points)
    Mar 18, 2014 5:12 AM in response to HalexPereira

    I too have notice my fan running and upon opening Activity Monitor I see the Kernel Task problem.  Upon awaking I don't see the issue until after 10 minutes or so...

    Another thing too, my Mac (Mavericks) Mini runs 24/7.  My Sound is run through an Audioengine D1, so the random CPU usage is bypassed?  Or not?  Either way it is an issue.  I can only think that there is a backround script running at various times throughout the day.  Hope this helps.

  • by flashcamo,

    flashcamo flashcamo Mar 19, 2014 11:39 AM in response to HalexPereira
    Level 1 (0 points)
    Mar 19, 2014 11:39 AM in response to HalexPereira

    Sitting here in kernel_task la la land.

     

    I have a vintage Early 2011 15" MacBook Pro running 10.9.2

    The kernal_task problem just began for me, out of the blue. I can not recall any updates other than 10.9.2 about a week ago. The CPU usage is floating between 550 to 700% and has rendered this machine useful useless for much of the work I need to do.

    In the pursuit of fancy new technology perhaps Apple has broken the stable old technologies. I got up at 3.30am to get working on a project and it's now 5.30am, all time so far wasted reading many others' same problems.

    My 2008 MACPRO died last week, and now this, what should I do!?

    After 10 years with Apple I might give Microsoft a call.

     

    Yes, the audio plug removal, sleep/wake cycle seems to kill the problem but then it starts again a few minutes later.

    System uses 80% CPU, User using 5% and Idle is 15%. Welcome back bloatware, not!

     

    Heading off to find a thread on how to clean install 10.8 and hoping it doesn't take a day to do!

  • by Radas_cz,

    Radas_cz Radas_cz Apr 1, 2014 9:42 AM in response to flashcamo
    Level 1 (0 points)
    Apr 1, 2014 9:42 AM in response to flashcamo

    Hi guys,

     

         what are the standard numbers for kernel_task for CPU and Memory as well? I have MBA 2013 13".

     

    Thank you

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