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My MacBook Pro has become slow lately. Activity monitor shows kernel task is using around 300% CPU. The fan is always on at high speed.

Below are the details of my computer:

  • Macbook Pro 13-inch, Mid 2012;
  • Processor 2.5 GHz Intel Core i5;
  • Memory 4 GB 1600 MHz DDR3;
  • Graphics Intel HD Graphics 4000

Please suggest some solutions.

I tried resetting the SMC a few times.

Console Log

Jun  5 17:17:11 Manishs-MacBook-Pro kernel[0]: Resetting IOCatalogue.
Jun  5 17:17:28 Manishs-MacBook-Pro.local com.apple.kextcache[212]: rebuilding /System/Library/Caches/com.apple.kext.caches/Startup/kernelcache
Jun  5 17:17:30 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.AppleThunderboltEDMSink failed; removing personalities from kernel.
Jun  5 17:17:31 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.AppleIntelMCEReporter failed; removing personalities from kernel.
Jun  5 17:17:32 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.AppleUpstreamUserClient failed; removing personalities from kernel.
Jun  5 17:17:33 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.iokit.IOFireWireIP failed; removing personalities from kernel.
Jun  5 17:17:34 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.SMCMotionSensor failed; removing personalities from kernel.
Jun  5 17:17:34 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.AppleIntelHD4000Graphics failed; removing personalities from kernel.
Jun  5 17:17:35 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.AppleMikeyDriver failed; removing personalities from kernel.
Jun  5 17:17:36 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.AppleSMCLMU failed; removing personalities from kernel.
Jun  5 17:17:37 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.ApplePlatformEnabler failed; removing personalities from kernel.
Jun  5 17:17:37 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.AppleHDAController failed; removing personalities from kernel.
Jun  5 17:17:39 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.AppleSMCPDRC failed; removing personalities from kernel.
Jun  5 17:17:39 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.AppleThunderboltIP failed; removing personalities from kernel.
Jun  5 17:17:41 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.driver.AppleHWAccess failed; removing personalities from kernel.
Jun  5 17:17:42 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.iokit.IOBluetoothSerialManager failed; removing personalities from kernel.
Jun  5 17:17:42 Manishs-MacBook-Pro.local com.apple.kextd[11]: Load com.apple.iokit.IOUserEthernet failed; removing personalities from kernel.
Jun  5 17:27:50 Manishs-MacBook-Pro.local com.apple.kextcache[244]: Created prelinked kernel /System/Library/Caches/com.apple.kext.caches/Startup/kernelcache.
Jun  5 17:27:51 Manishs-MacBook-Pro kernel[0]: Kext loading now disabled.
Jun  5 17:27:51 Manishs-MacBook-Pro kernel[0]: Kext unloading now disabled.
Jun  5 17:27:51 Manishs-MacBook-Pro kernel[0]: Kext autounloading now disabled.
Jun  5 17:27:51 Manishs-MacBook-Pro kernel[0]: Kernel requests now disabled.
Jun  5 17:29:35 localhost kernel[0]: Longterm timer threshold: 1000 ms
Jun  5 17:29:35 localhost kernel[0]: PMAP: PCID enabled
Jun  5 17:29:35 localhost kernel[0]: PMAP: Supervisor Mode Execute Protection enabled
Jun  5 17:29:35 localhost kernel[0]: Darwin Kernel Version 13.2.0: Thu Apr 17 23:03:13 PDT 2014; root:xnu-2422.100.13~1/RELEASE_X86_64
Jun  5 17:29:35 localhost kernel[0]: vm_page_bootstrap: 939686 free pages and 100698 wired pages
Jun  5 17:29:35 localhost kernel[0]: kext submap [0xffffff7f807a9000 - 0xffffff8000000000], kernel text [0xffffff8000200000 - 0xffffff80007a9000]
Jun  5 17:29:35 localhost kernel[0]: zone leak detection enabled
Jun  5 17:29:35 localhost kernel[0]: "vm_compressor_mode" is 4
Jun  5 17:29:35 localhost kernel[0]: standard timeslicing quantum is 10000 us
Jun  5 17:29:35 localhost kernel[0]: standard background quantum is 2500 us
Jun  5 17:29:35 localhost kernel[0]: mig_table_max_displ = 74
Jun  5 17:29:35 localhost kernel[0]: TSC Deadline Timer supported and enabled
Jun  5 17:29:35 localhost kernel[0]: AppleACPICPU: ProcessorId=1 LocalApicId=0 Enabled
Jun  5 17:29:35 localhost kernel[0]: AppleACPICPU: ProcessorId=2 LocalApicId=2 Enabled
Jun  5 17:29:35 localhost kernel[0]: AppleACPICPU: ProcessorId=3 LocalApicId=1 Enabled
Jun  5 17:29:35 localhost kernel[0]: AppleACPICPU: ProcessorId=4 LocalApicId=3 Enabled
Jun  5 17:29:35 localhost kernel[0]: AppleACPICPU: ProcessorId=5 LocalApicId=255 Disabled
Jun  5 17:29:35 localhost kernel[0]: AppleACPICPU: ProcessorId=6 LocalApicId=255 Disabled
Jun  5 17:29:35 localhost kernel[0]: AppleACPICPU: ProcessorId=7 LocalApicId=255 Disabled
Jun  5 17:29:35 localhost kernel[0]: AppleACPICPU: ProcessorId=8 LocalApicId=255 Disabled
Jun  5 17:29:35 localhost kernel[0]: calling mpo_policy_init for TMSafetyNet
Jun  5 17:29:35 localhost kernel[0]: Security policy loaded: Safety net for Time Machine (TMSafetyNet)
Jun  5 17:29:35 localhost kernel[0]: calling mpo_policy_init for Sandbox
Jun  5 17:29:35 localhost kernel[0]: Security policy loaded: Seatbelt sandbox policy (Sandbox)
Jun  5 17:29:35 localhost kernel[0]: calling mpo_policy_init for Quarantine
Jun  5 17:29:35 localhost kernel[0]: Security policy loaded: Quarantine policy (Quarantine)
Jun  5 17:29:35 localhost kernel[0]: Copyright (c) 1982, 1986, 1989, 1991, 1993
Jun  5 17:29:35 localhost kernel[0]: The Regents of the University of California. All rights reserved.
Jun  5 17:29:35 localhost kernel[0]: MAC Framework successfully initialized
Jun  5 17:29:35 localhost kernel[0]: using 16384 buffer headers and 10240 cluster IO buffer headers
Jun  5 17:29:35 localhost kernel[0]: AppleKeyStore starting (BUILT: Apr 17 2014 23:36:27)
Jun  5 17:29:35 localhost kernel[0]: IOAPIC: Version 0x20 Vectors 64:87
Jun  5 17:29:35 localhost kernel[0]: ACPI: sleep states S3 S4 S5
Jun  5 17:29:35 localhost kernel[0]: AppleIntelCPUPowerManagement: Turbo Ratios 0046
Jun  5 17:29:35 localhost kernel[0]: AppleIntelCPUPowerManagement: (built 23:35:25 Apr 17 2014) initialization complete
Jun  5 17:29:35 localhost kernel[0]: pci (build 23:24:05 Apr 17 2014), flags 0x63008, pfm64 (36 cpu) 0xf80000000, 0x80000000
Jun  5 17:29:35 localhost kernel[0]: [ PCI configuration begin ]
Jun  5 17:29:35 localhost kernel[0]: console relocated to 0xf80000000
Jun  5 17:29:35 localhost kernel[0]: [ PCI configuration end, bridges 11, devices 15 ]
Jun  5 17:29:35 localhost kernel[0]: FireWire (OHCI) Lucent ID 5901 built-in now active, GUID 003ee1fffea1d692; max speed s800.
Jun  5 17:29:35 localhost kernel[0]: mcache: 4 CPU(s), 64 bytes CPU cache line size
Jun  5 17:29:35 localhost kernel[0]: mbinit: done [64 MB total pool size, (42/21) split]
Jun  5 17:29:35 localhost kernel[0]: Pthread support ABORTS when sync kernel primitives misused
Jun  5 17:29:35 localhost kernel[0]: rooting via boot-uuid from /chosen: CE01C8BF-EA58-3180-808C-44150001BB0D
Jun  5 17:29:35 localhost kernel[0]: Waiting on <dict ID="0"><key>IOProviderClass</key><string ID="1">IOResources</string><key>IOResourceMatch</key><string ID="2">boot-uuid-media</string></dict>
Jun  5 17:29:35 localhost kernel[0]: com.apple.AppleFSCompressionTypeZlib kmod start
Jun  5 17:29:35 localhost kernel[0]: com.apple.AppleFSCompressionTypeDataless kmod start
Jun  5 17:29:35 localhost kernel[0]: com.apple.AppleFSCompressionTypeZlib load succeeded
Jun  5 17:29:35 localhost kernel[0]: com.apple.AppleFSCompressionTypeDataless load succeeded
Jun  5 17:29:35 localhost kernel[0]: AppleIntelCPUPowerManagementClient: ready
Jun  5 17:29:35 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchSeriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOBlockStorageDriver/APPLE HDD TOSHIBA MK5065GSXF Media/IOGUIDPartitionScheme/Customer@2
Jun  5 17:29:35 localhost kernel[0]: BSD root: disk0s2, major 1, minor 1
Jun  5 17:29:35 localhost kernel[0]: BTCOEXIST off 
Jun  5 17:29:35 localhost kernel[0]: BRCM tunables:
Jun  5 17:29:35 localhost kernel[0]: pullmode[1] txringsize[  256] txsendqsize[1024] reapmin[   32] reapcount[  128]
Jun  5 17:29:35 localhost kernel[0]: hfs: mounted Macintosh HD on device root_device
Jun  5 17:29:35 localhost kernel[0]: Thunderbolt Self-Reset Count = 0xedefbe00
Jun  5 17:29:35 localhost kernel[0]: AppleUSBMultitouchDriver::checkStatus - received Status Packet, Payload 2: device was reinitialized
Jun  5 17:29:35 localhost kernel[0]: pci pause: SDXC
Jun  5 17:29:35 localhost kernel[0]: VM Swap Subsystem is ON
Jun  5 17:29:35 localhost kernel[0]: Waiting for DSMOS...
Jun  5 17:29:35 localhost kernel[0]: IOBluetoothUSBDFU::probe
Jun  5 17:29:35 localhost kernel[0]: IOBluetoothUSBDFU::probe ProductID - 0x821D FirmwareVersion - 0x0131
Jun  5 17:29:35 localhost kernel[0]: **** [IOBluetoothHostControllerUSBTransport][start] -- completed -- result = TRUE -- 0xdc00 ****
Jun  5 17:29:35 localhost kernel[0]: **** [BroadcomBluetoothHostControllerUSBTransport][start] -- Completed -- 0xdc00 ****
Jun  5 17:29:35 localhost kernel[0]: SMC::smcReadKeyAction ERROR: smcReadData8 failed for key LsNM (kSMCKeyNotFound)
Jun  5 17:29:35 localhost kernel[0]: SMC::smcReadKeyAction ERROR LsNM kSMCKeyNotFound(0x84) fKeyHashTable=0x0
Jun  5 17:29:35 localhost kernel[0]: SMC::smcGetLightshowVers ERROR: smcReadKey LsNM failed (kSMCKeyNotFound)
Jun  5 17:29:35 localhost kernel[0]: SMC::smcPublishLightshowVersion ERROR: smcGetLightshowVers failed (kSMCKeyNotFound)
Jun  5 17:29:35 localhost kernel[0]: SMC::smcInitHelper ERROR: smcPublishLightshowVersion failed (kSMCKeyNotFound)
Jun  5 17:29:35 localhost kernel[0]: Previous Shutdown Cause: 5
Jun  5 17:29:35 localhost kernel[0]: init
Jun  5 17:29:35 localhost kernel[0]: probe
Jun  5 17:29:35 localhost kernel[0]: start
Jun  5 17:29:35 localhost kernel[0]: [IOBluetoothHCIController][staticBluetoothHCIControllerTransportShowsUp] -- Received Bluetooth Controller register service notification -- 0xdc00 
Jun  5 17:29:35 localhost kernel[0]: [IOBluetoothHCIController][start] -- completed
Jun  5 17:29:35 localhost kernel[0]: DSMOS has arrived
Jun  5 17:29:35 localhost kernel[0]: [IOBluetoothHCIController::setConfigState] calling registerService
Jun  5 17:29:35 localhost kernel[0]: **** [IOBluetoothHCIController][protectedBluetoothHCIControllerTransportShowsUp] -- Connected to the transport successfully -- 0x2c40 -- 0x2000 -- 0xdc00 ****
Jun  5 17:29:36 localhost kernel[0]: m_tail has not been written to hardware: m_tail = 0x00000000, hardare tail register = 0x00000060
Jun  5 17:29:39 localhost kernel[0]: IO80211Controller::dataLinkLayerAttachComplete():  adding AppleEFINVRAM notification
Jun  5 17:29:39 localhost kernel[0]: IO80211Interface::efiNVRAMPublished():  
Jun  5 17:29:41 localhost kernel[0]: AirPort: Link Down on en1. Reason 8 (Disassociated because station leaving).
Jun  5 17:29:48 Manishs-MacBook-Pro kernel[0]: createVirtIf(): ifRole = 1
Jun  5 17:29:48 Manishs-MacBook-Pro kernel[0]: in func createVirtualInterface ifRole = 1
Jun  5 17:29:48 Manishs-MacBook-Pro kernel[0]: AirPort_Brcm4331_P2PInterface::init name <p2p0> role 1
Jun  5 17:29:48 Manishs-MacBook-Pro kernel[0]: AirPort_Brcm4331_P2PInterface::init() <p2p> role 1
Jun  5 17:29:48 Manishs-MacBook-Pro kernel[0]: Created virtif 0xffffff8018179000 p2p0
Jun  5 17:29:51 Manishs-MacBook-Pro kernel[0]: flow_divert_kctl_disconnect (0): disconnecting group 1
Jun  5 17:29:51 Manishs-MacBook-Pro kernel[0]: **** [IOBluetoothHostControllerUSBTransport][SuspendDevice] -- Suspend -- 
suspendDeviceCallResult = 0x0000 (kIOReturnSuccess) -- 0xdc00 ****
Jun  5 17:29:57 Manishs-MacBook-Pro kernel[0]: IOPPF: AppleIntelCPUPowerManagement mode
Jun  5 17:29:57 Manishs-MacBook-Pro kernel[0]: IOPPF: Sent gpu-internal-plimit-notification last value 14 (rounded time weighted average 14)
Jun  5 17:29:57 Manishs-MacBook-Pro kernel[0]: IOPPF: Sent cpu-plimit-notification last value 19 (rounded time weighted average 19)
Jun  5 17:29:57 Manishs-MacBook-Pro kernel[0]: IOPPF: Sent cpu-idle-plimit-notification last value 60 (rounded time weighted average 60)
Jun  5 17:30:00 Manishs-MacBook-Pro kernel[0]: en3: promiscuous mode enable succeeded
Jun  5 17:32:00 Manishs-MacBook-Pro kernel[0]: CODE SIGNING: cs_invalid_page(0x1000): p=229[GoogleSoftwareUp] final status 0x0, allowing (remove VALID) page
Jun  5 17:32:14 Manishs-MacBook-Pro kernel[0]: AppleKeyStore:Sending lock change 0
Jun  5 17:34:12 Manishs-MacBook-Pro kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 100-Megabit, Full-duplex, Symmetric flow-control, Debug [796d,0301,0de1,0300,45e1,0000]
Jun  5 17:34:13 Manishs-MacBook-Pro kernel[0]: AppleBCM5701Ethernet [en0]:       44     600a receivePackets - got vlan packet
Jun  5 17:35:34 Manishs-MacBook-Pro kernel[0]: fsevents: watcher dbfseventsd (pid: 302) - Using /dev/fsevents directly is unsupported.  Migrate to FSEventsFramework
Jun  5 17:36:10 Manishs-MacBook-Pro kernel[0]: considerRebuildOfPrelinkedKernel prebuild rebuild has expired
Improve this question
8
  • Is your Mavericks up-to-date ?
    – Matthieu Riegler
    Jun 5, 2014 at 8:01
  • Look in the Console to see what is it doing?
    – Ruskes
    Jun 5, 2014 at 8:44
  • @MatthieuRiegler I think so.
    – Manish Kumar
    Jun 5, 2014 at 10:44
  • @Buscar it is doing a lot of things but how do I know which one is taking the most CPU time?
    – Manish Kumar
    Jun 5, 2014 at 10:48
  • @Buscar웃 also added a screen shot of system logs on kernel.
    – Manish Kumar
    Jun 5, 2014 at 11:28

2 Answers 2

Reset to default
10

Check this solution from macrumors:

  1. Go to About this mac under the apple in the upper left and click on More info
  2. Click on system report
  3. Make a note of what it says after Model Identifier
  4. Go to the folder (this can be achieved in Finder using Go>Go to Folder (cmd-shift-g) ) /System/Library/Extensions/IOPlatformPluginFamily.kext/Contents/Plugins/ACPI_SMC_PlatformPlugin.kext/Contents/Resources
  5. Find the name from step 3 and move it to a folder that you can find again if needed.
  6. Restart and you’re done
Improve this answer
9
  • 1
    Seems to work on 10.10 Yosemite Beta, too.
    – psychowood
    Oct 6, 2014 at 16:46
  • 3
    What if there is no file corresponding to my Model Identifier (MacBookPro10,1)?
    – Kudit
    May 7, 2015 at 20:11
  • 1
    @Gujamin, for that case, sudo mv /System/Library/Extensions/IOPlatformPluginFamily.kext/ ~ worked for me.
    – Vivek Pandey
    Jun 9, 2015 at 5:25
  • 9
    What exactly is this solution doing?
    – Iulian Onofrei
    May 9, 2016 at 8:18
  • 1
    @VivekPandey mv: rename /System/Library/Extensions/IOPlatformPluginFamily.kext/ to ~ Operation not permitted
    – Ivan Balashov
    Jul 22, 2020 at 10:56
1

Re-install OS X system using a Time Machine backup

The easy way is to reinstall OS X and restore using a Time Machine backup.

First make shure you have a Time Machine backup.

Time Machine works with any hard disk connected to your computer using USB, FireWire or Thunderbolt.

  • Select the Time Machine icon from the Menu.
  • Select Open Time Machine Preferences...
  • If Time Machine is off, set the slider to on.
  • Select the disk you want to use as a Time Machine backup.
  • Time Machine will set the hard drive up for backups and will automatically start the first backup within two minutes.

Use these steps if you need to erase a disk before installing OS X:

  • Before you begin, you need to be connected to the Internet.
  • Choose Apple menu > Restart, and then hold down the Command (⌘) and R keys while the computer restarts.
  • Select “Disk Utility,” and then click Continue. Select your startup disk from the list on the left, and then click the Erase tab.
  • From the Format pop-up menu, select Mac OS Extended (Journaled), type a name for your disk, and then click Erase.
  • After the disk has been erased, choose Disk Utility > Quit Disk Utility.
  • If you’re not connected to the Internet, choose a network from the Wi-Fi menu in the right corner of the menu bar (in the top-right corner of the screen). Select Reinstall Mac OS X, click Continue, and then follow the instructions.

To restore the complete contents of your hard drive from a Time Machine backup:

  • Power up your Mac and hold down the command and R keys to enter the Recovery Partition. Your Mac should boot to a screen that says OS X Utilities.
  • Select Restore from Time Machine Backup and click Continue.
  • Read the info on the Restore Your System page and click Continue.
  • Select your Time Machine backup and click Continue.
  • Select the most recent backup of your hard disk and click Continue. Your Mac will then restore the Time Machine backup; once it's done it will restart.

iMore apple.com

Improve this answer
1
  • This appears to have solved it for me on Yosemite 10.10.3 on rMBP late 2012
    – ultra909
    Jul 8, 2015 at 17:28

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