Tyczar92

Q: My mavericks operating system is crazy!

I have looked into why mavericks crashes and I have looked into other threads that talk about it crashing but i can figure it out. My situation is pretty unique. First ever since I installed mavericks i have been having problems. my Macbook pro opens up to the home screen extremely slow and takes about 5-8 minutes to load everything onto the screen even though there isn't very much. Also upon turning my computer on it automatically opens apps I used previously or haven't used in a few weeks, I set them to not open automatically and they still do.?!?! and the worse of it all randomly without warning my screen goes black and I get this screen, It doesn't matter if i have 1 app open or 20 it will do it at random times, then reset. Its a huge problem because I run my business off of this computer and its not very professional when you're trying to work and it crashes or worse I'm trying to show a customer something. Please help, I've been trying to fix this problem for about a year now and nothing helps Ive don't utility and disk repairs, nothing helps.

 

My macbook pro:

2.66 GHz intel core i7

4GB 1067 MHZ DDR3

 

Thank,

Tyler

 

photo-3.JPG

Posted on Oct 12, 2014 8:56 AM

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Q: My mavericks operating system is crazy!

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  • Helpful answers

  • by Esquared,

    Esquared Esquared Oct 12, 2014 8:59 AM in response to Tyczar92
    Level 6 (8,405 points)
    Mac OS X
    Oct 12, 2014 8:59 AM in response to Tyczar92

    That screen is a kernel panic. It might be caused by failing hardware, but could also be software-related.

     

    Based on your description it is hard to tell what might be the real cause. To give us some idea of what is installed on your MBP you could post the results of EtreCheck: http://www.etresoft.com/etrecheck

  • by Tyczar92,

    Tyczar92 Tyczar92 Oct 12, 2014 9:09 AM in response to Esquared
    Level 1 (4 points)
    iTunes
    Oct 12, 2014 9:09 AM in response to Esquared

    Hardware Information: ℹ️

      MacBook Pro (15-inch, Mid 2010) (Verified)

      MacBook Pro - model: MacBookPro6,2

      1 2.66 GHz Intel Core i7 CPU: 2-core

      4 GB RAM Upgradeable

      BANK 0/DIMM0

      2 GB DDR3 1067 MHz ok

      BANK 1/DIMM0

      2 GB DDR3 1067 MHz ok

      Bluetooth: Old - Handoff/Airdrop2 not supported

      Wireless:  en1: 802.11 a/b/g/n

     

    Video Information: ℹ️

      Intel HD Graphics - VRAM: 288 MB

      NVIDIA GeForce GT 330M - VRAM: 512 MB

      Color LCD 1440 x 900

     

    System Software: ℹ️

      OS X 10.9.5 (13F34) - Uptime: 0 days 1:28:32

     

    Disk Information: ℹ️

      ST9500325ASG disk0 : (500.11 GB)

      S.M.A.R.T. Status: Verified

      EFI (disk0s1) <not mounted> : 210 MB

      Macintosh HD (disk0s2) /  [Startup]: 499.25 GB (30.63 GB free)

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

     

      MATSHITADVD-R   UJ-898 

     

    USB Information: ℹ️

      Apple Computer, Inc. IR Receiver

      Apple Inc. Built-in iSight

      Logitech USB Optical Mouse

      Apple Internal Memory Card Reader

      Apple Inc. BRCM2070 Hub

      Apple Inc. Bluetooth USB Host Controller

      Apple Inc. Apple Internal Keyboard / Trackpad

     

    Configuration files: ℹ️

      /etc/hosts - Count: 30

     

    Gatekeeper: ℹ️

      Mac App Store and identified developers

     

    Kernel Extensions: ℹ️

      /System/Library/Extensions

      [not loaded] com.wacom.kext.pentablet (5.2.3) Support

      [not loaded] com.wdc.driver.1394HP (1.0.7) Support

      [not loaded] com.wdc.driver.USBHP (1.0.7) Support

     

    Launch Agents: ℹ️

      [not loaded] com.adobe.AAM.Updater-1.0.plist Support

      [loaded] com.adobe.CS5ServiceManager.plist Support

      [loaded] com.google.keystone.agent.plist Support

      [running] com.wacom.pentablet.plist Support

     

    Launch Daemons: ℹ️

      [invalid?] .plist (hidden) Support

      /usr/local/libexec/TorchUpdater /usr/local/libexec/TorchUpdater --hello=torch

      [loaded] com.adobe.fpsaud.plist Support

      [invalid?] com.adobe.SwitchBoard.plist Support

      [loaded] com.google.keystone.daemon.plist Support

      [loaded] com.microsoft.office.licensing.helper.plist Support

     

    User Launch Agents: ℹ️

      [loaded] com.adobe.AAM.Updater-1.0.plist Support

      [invalid?] com.adobe.ARM.[...].plist Support

      [loaded] com.adobe.ARM.[...].plist Support

      [loaded] com.genieo.completer.download.plist Support

      [loaded] com.genieo.completer.update.plist Support

      [running] com.spotify.webhelper.plist Support

     

    User Login Items: ℹ️

      iTunesHelper UNKNOWNHidden (missing value)

      SpeechSynthesisServer Application (/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks /SpeechSynthesis.framework/Versions/A/SpeechSynthesisServer.app)

      Dropbox Application (/Applications/Dropbox.app)

      Google Chrome ApplicationHidden (/Applications/Google Chrome.app)

      Genieo 6.28.46 PM Application (/Users/[redacted]/.Trash/Genieo 6.28.46 PM.app)

      WDQuickView Application (/Incompatible Software/WDQuickView.app)

     

    Internet Plug-ins: ℹ️

      DirectorShockwave: Version: 11.6.8r638 Support

      o1dbrowserplugin: Version: 5.4.2.18903 Support

      WacomNetscape: Version: 1.1.0-6 Support

      Unity Web Player: Version: UnityPlayer version 4.3.5f1 - SDK 10.6 Support

      Default Browser: Version: 537 - SDK 10.9

      WacomSafari: Version: 1.1.0-6 Support

      Silverlight: Version: 5.0.61118.0 - SDK 10.6 Support

      FlashPlayer-10.6: Version: 15.0.0.152 - SDK 10.6 Support

      Flash Player: Version: 15.0.0.152 - SDK 10.6 Support

      QuickTime Plugin: Version: 7.7.3

      googletalkbrowserplugin: Version: 5.4.2.18903 Support

      SharePointBrowserPlugin: Version: 14.2.0 - SDK 10.6 Support

      AdobePDFViewer: Version: 9.5.5 Support

      iPhotoPhotocast: Version: 7.0

      JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version

     

    Safari Extensions: ℹ️

      Omnibar

     

    3rd Party Preference Panes: ℹ️

      PenTablet  Support

      Flash Player  Support

      Growl  Support

      Perian  Support

     

    Time Machine: ℹ️

      Time Machine not configured!

     

    Top Processes by CPU: ℹ️

        102% PenTabletDriver

          43% launchservicesd

          2% WindowServer

          1% Safari

          0% hidd

     

    Top Processes by Memory: ℹ️

      107 MB com.apple.WebKit.WebContent

      94 MB mds_stores

      90 MB Mail

      86 MB Safari

      77 MB Dropbox

     

    Virtual Memory Information: ℹ️

      919 MB Free RAM

      1.64 GB Active RAM

      720 MB Inactive RAM

      876 MB Wired RAM

      565 MB Page-ins

      0 B Page-outs

  • by Eric Root,

    Eric Root Eric Root Oct 12, 2014 10:18 AM in response to Tyczar92
    Level 9 (69,813 points)
    iTunes
    Oct 12, 2014 10:18 AM in response to Tyczar92
  • by Esquared,

    Esquared Esquared Oct 12, 2014 10:26 AM in response to Tyczar92
    Level 6 (8,405 points)
    Mac OS X
    Oct 12, 2014 10:26 AM in response to Tyczar92

    PenTablet Driver is going bezerk. If you still need it, check if there's a newer version available. Otherwise uninstall.

     

    And there is that modified hosts file.... It might be possible that you know what these modifications are for, but there are also trojans roaming around that make such modifications.

  • by Linc Davis,

    Linc Davis Linc Davis Oct 12, 2014 3:46 PM in response to Tyczar92
    Level 10 (207,926 points)
    Applications
    Oct 12, 2014 3:46 PM in response to Tyczar92

    These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.

    Launch the Console application in any of the following ways:

    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

    ☞ In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

    ☞ Open LaunchPad. Click Utilities, then Console in the icon grid.

    If you don't see any reports listed, but you know there was a panic, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.

    In the Console window, select

              DIAGNOSTIC AND USAGE INFORMATION System Diagnostic Reports

    (not Diagnostic and Usage Messages) from the log list on the left. If you don't see that list, select

              View Show Log List

    from the menu bar.

    There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down. You'll see a list of reports. A panic report has a name that begins with "Kernel" and ends in ".panic". Select the most recent one. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot.

    In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)

    Please don’t post other kinds of diagnostic report.

    I know the report is long, maybe several hundred lines. Please post all of it anyway.

  • by Tyczar92,

    Tyczar92 Tyczar92 Oct 13, 2014 4:32 PM in response to Linc Davis
    Level 1 (4 points)
    iTunes
    Oct 13, 2014 4:32 PM in response to Linc Davis

    Anonymous UUID:

     

    Mon Oct 13 19:17:33 2014

    panic(cpu 0 caller 0xffffff7f96597f7c): "GPU Panic: [<None>] 5 3 7f 0 0 0 0 3 : NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0x0a2910de 0x00100000 0x00000000, BAR0 0xc0000000 0xffffff80bbcf1000 0x0a5480a2, D0, P3/4\n"@/SourceCache/AppleGraphicsControl/AppleGraphicsControl-3.6.22/src/Apple MuxControl/kext/GPUPanic.cpp:127

    Backtrace (CPU 0), Frame : Return Address

    0xffffff801c1eb6b0 : 0xffffff8014222f79

    0xffffff801c1eb730 : 0xffffff7f96597f7c

    0xffffff801c1eb800 : 0xffffff7f94c26f1b

    0xffffff801c1eb8c0 : 0xffffff7f94cf050a

    0xffffff801c1eb900 : 0xffffff7f94cf057a

    0xffffff801c1eb970 : 0xffffff7f94f6f056

    0xffffff801c1ebaa0 : 0xffffff7f94d13ba9

    0xffffff801c1ebac0 : 0xffffff7f94c2d96d

    0xffffff801c1ebb70 : 0xffffff7f94c2b478

    0xffffff801c1ebd70 : 0xffffff7f94c2c518

    0xffffff801c1ebe50 : 0xffffff7f94bd92de

    0xffffff801c1ebeb0 : 0xffffff7f965694e6

    0xffffff801c1ebf00 : 0xffffff7f9656820e

    0xffffff801c1ebf20 : 0xffffff801424a20a

    0xffffff801c1ebfb0 : 0xffffff80142d7607

          Kernel Extensions in backtrace:

             com.apple.driver.AppleMuxControl(3.6.22)[32862231-50BC-3AF6-87A2-703321AE4F90]@ 0xffffff7f96589000->0xffffff7f9659cfff

                dependency: com.apple.driver.AppleGraphicsControl(3.6.22)[AA46D551-BE0F-33DA-93A3-8F46197BB 36F]@0xffffff7f96581000

                dependency: com.apple.iokit.IOACPIFamily(1.4)[045D5D6F-AD1E-36DB-A249-A346E2B48E54]@0xfffff f7f94b2c000

                dependency: com.apple.iokit.IOPCIFamily(2.9)[2852ACFE-FD28-3C37-9B39-885201BB8D25]@0xffffff 7f948bf000

                dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[75D81741-64C1-3941-ADFA-9D6B6C434EE4]@0 xffffff7f94b84000

                dependency: com.apple.driver.AppleBacklightExpert(1.0.4)[80899285-3952-30DA-A0F9-357C51E104 CF]@0xffffff7f96584000

             com.apple.nvidia.classic.NVDAResmanTesla(8.2.4)[D61B2BB9-4289-318D-9197-5E1E13B 1FF32]@0xffffff7f94bd7000->0xffffff7f94e3ffff

                dependency: com.apple.iokit.IOPCIFamily(2.9)[2852ACFE-FD28-3C37-9B39-885201BB8D25]@0xffffff 7f948bf000

                dependency: com.apple.iokit.IONDRVSupport(2.4.1)[D41125CE-69BD-32E7-9B1D-4E83431662DD]@0xff ffff7f94bc7000

                dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[75D81741-64C1-3941-ADFA-9D6B6C434EE4]@0 xffffff7f94b84000

             com.apple.nvidia.classic.NVDANV50HalTesla(8.2.4)[B0E6AAA7-E970-3D81-8B43-145D56 A3A4AC]@0xffffff7f94e4a000->0xffffff7f950f3fff

                dependency: com.apple.nvidia.classic.NVDAResmanTesla(8.2.4)[D61B2BB9-4289-318D-9197-5E1E13B 1FF32]@0xffffff7f94bd7000

                dependency: com.apple.iokit.IOPCIFamily(2.9)[2852ACFE-FD28-3C37-9B39-885201BB8D25]@0xffffff 7f948bf000

             com.apple.driver.AGPM(100.14.34)[B40DF46A-AA80-39C2-BBC6-DA5DF93509AC]@0xffffff 7f96566000->0xffffff7f96578fff

                dependency: com.apple.iokit.IOPCIFamily(2.9)[2852ACFE-FD28-3C37-9B39-885201BB8D25]@0xffffff 7f948bf000

                dependency: com.apple.driver.IOPlatformPluginFamily(5.7.1d6)[67BEDCC9-E9AB-3F32-82CE-84729F B82C0A]@0xffffff7f95618000

                dependency: com.apple.iokit.IONDRVSupport(2.4.1)[D41125CE-69BD-32E7-9B1D-4E83431662DD]@0xff ffff7f94bc7000

                dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[75D81741-64C1-3941-ADFA-9D6B6C434EE4]@0 xffffff7f94b84000

                dependency: com.apple.AppleGraphicsDeviceControl(3.6.22)[91D61DEC-2946-3790-8134-B808C016C4 C9]@0xffffff7f96560000

     

     

    BSD process name corresponding to current thread: kernel_task

     

     

    Mac OS version:

    13F34

     

     

    Kernel version:

    Darwin Kernel Version 13.4.0: Sun Aug 17 19:50:11 PDT 2014; root:xnu-2422.115.4~1/RELEASE_X86_64

    Kernel UUID: 9477416E-7BCA-3679-AF97-E1EAAD3DD5A0

    Kernel slide:     0x0000000014000000

    Kernel text base: 0xffffff8014200000

    System model name: MacBookPro6,2 (Mac-F22586C8)

     

     

    System uptime in nanoseconds: 944000387581

    last loaded kext at 275740390696: com.apple.filesystems.msdosfs 1.9 (addr 0xffffff7f95119000, size 65536)

    last unloaded kext at 402001206100: com.apple.filesystems.msdosfs 1.9 (addr 0xffffff7f95119000, size 57344)

    loaded kexts:

    com.apple.driver.AudioAUUC 1.60

    com.apple.driver.AppleHWSensor 1.9.5d0

    com.apple.driver.AGPM 100.14.34

    com.apple.filesystems.autofs 3.0

    com.apple.iokit.IOBluetoothSerialManager 4.2.7f3

    com.apple.driver.AppleMikeyHIDDriver 124

    com.apple.driver.AppleHDA 2.6.3f4

    com.apple.GeForceTesla 8.2.4

    com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

    com.apple.driver.AppleSMCPDRC 1.0.0

    com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.7f3

    com.apple.driver.AppleSMCLMU 2.0.4d1

    com.apple.driver.AppleMuxControl 3.6.22

    com.apple.driver.AppleMikeyDriver 2.6.3f4

    com.apple.driver.AppleUpstreamUserClient 3.5.13

    com.apple.driver.AppleMCCSControl 1.2.5

    com.apple.driver.AppleIntelHDGraphics 8.2.4

    com.apple.driver.AppleIntelHDGraphicsFB 8.2.4

    com.apple.iokit.IOUserEthernet 1.0.0d1

    com.apple.Dont_Steal_Mac_OS_X 7.0.0

    com.apple.driver.AppleHWAccess 1

    com.apple.driver.AppleLPC 1.7.0

    com.apple.driver.SMCMotionSensor 3.0.4d1

    com.apple.driver.AppleUSBTCButtons 240.2

    com.apple.driver.AppleUSBCardReader 3.4.1

    com.apple.driver.AppleUSBTCKeyboard 240.2

    com.apple.driver.AppleIRController 325.7

    com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

    com.apple.AppleFSCompression.AppleFSCompressionTypeLZVN 1.0.0d1

    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

    com.apple.BootCache 35

    com.apple.iokit.SCSITaskUserClient 3.6.7

    com.apple.driver.XsanFilter 404

    com.apple.iokit.IOAHCIBlockStorage 2.6.0

    com.apple.driver.AppleUSBHub 683.4.0

    com.apple.driver.AirPort.Brcm4331 700.20.22

    com.apple.driver.AppleAHCIPort 3.0.5

    com.apple.driver.AppleFWOHCI 5.0.2

    com.apple.iokit.AppleBCM5701Ethernet 3.8.1b2

    com.apple.driver.AppleUSBEHCI 660.4.0

    com.apple.driver.AppleSmartBatteryManager 161.0.0

    com.apple.driver.AppleACPIButtons 2.0

    com.apple.driver.AppleRTC 2.0

    com.apple.driver.AppleHPET 1.8

    com.apple.driver.AppleSMBIOS 2.1

    com.apple.driver.AppleACPIEC 2.0

    com.apple.driver.AppleAPIC 1.7

    com.apple.driver.AppleIntelCPUPowerManagementClient 217.92.1

    com.apple.nke.applicationfirewall 153

    com.apple.security.quarantine 3

    com.apple.driver.AppleIntelCPUPowerManagement 217.92.1

    com.apple.AppleGraphicsDeviceControl 3.6.22

    com.apple.kext.triggers 1.0

    com.apple.iokit.IOSerialFamily 10.0.7

    com.apple.driver.DspFuncLib 2.6.3f4

    com.apple.vecLib.kext 1.0.0

    com.apple.iokit.IOAudioFamily 1.9.7fc2

    com.apple.kext.OSvKernDSPLib 1.14

    com.apple.nvidia.classic.NVDANV50HalTesla 8.2.4

    com.apple.nvidia.classic.NVDAResmanTesla 8.2.4

    com.apple.iokit.IOFireWireIP 2.2.6

    com.apple.driver.IOPlatformPluginLegacy 1.0.0

    com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.7f3

    com.apple.driver.AppleHDAController 2.6.3f4

    com.apple.iokit.IOHDAFamily 2.6.3f4

    com.apple.driver.AppleBacklightExpert 1.0.4

    com.apple.driver.AppleGraphicsControl 3.6.22

    com.apple.driver.AppleSMBusPCI 1.0.12d1

    com.apple.driver.AppleSMBusController 1.0.12d1

    com.apple.iokit.IONDRVSupport 2.4.1

    com.apple.iokit.IOSurface 91.1

    com.apple.iokit.IOGraphicsFamily 2.4.1

    com.apple.iokit.IOBluetoothFamily 4.2.7f3

    com.apple.driver.IOPlatformPluginFamily 5.7.1d6

    com.apple.driver.AppleSMC 3.1.8

    com.apple.iokit.IOSCSIBlockCommandsDevice 3.6.7

    com.apple.iokit.IOUSBMassStorageClass 3.6.0

    com.apple.driver.AppleUSBMultitouch 240.10

    com.apple.iokit.IOUSBHIDDriver 660.4.0

    com.apple.driver.AppleUSBMergeNub 650.4.0

    com.apple.driver.AppleUSBComposite 656.4.1

    com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.6.7

    com.apple.iokit.IOBDStorageFamily 1.7

    com.apple.iokit.IODVDStorageFamily 1.7.1

    com.apple.iokit.IOCDStorageFamily 1.7.1

    com.apple.iokit.IOAHCISerialATAPI 2.6.1

    com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.7

    com.apple.iokit.IO80211Family 640.36

    com.apple.iokit.IOAHCIFamily 2.6.5

    com.apple.iokit.IOUSBUserClient 660.4.2

    com.apple.iokit.IOFireWireFamily 4.5.5

    com.apple.iokit.IOEthernetAVBController 1.0.3b4

    com.apple.driver.mDNSOffloadUserClient 1.0.1b5

    com.apple.iokit.IONetworkingFamily 3.2

    com.apple.iokit.IOUSBFamily 686.4.1

    com.apple.driver.AppleEFINVRAM 2.0

    com.apple.driver.AppleEFIRuntime 2.0

    com.apple.iokit.IOHIDFamily 2.0.0

    com.apple.iokit.IOSMBusFamily 1.1

    com.apple.security.sandbox 278.11.1

    com.apple.kext.AppleMatch 1.0.0d1

    com.apple.security.TMSafetyNet 7

    com.apple.driver.AppleKeyStore 2

    com.apple.driver.DiskImages 371.1

    com.apple.iokit.IOStorageFamily 1.9

    com.apple.iokit.IOReportFamily 23

    com.apple.driver.AppleFDEKeyStore 28.30

    com.apple.driver.AppleACPIPlatform 2.0

    com.apple.iokit.IOPCIFamily 2.9

    com.apple.iokit.IOACPIFamily 1.4

    com.apple.kec.corecrypto 1.0

    com.apple.kec.pthread 1

  • by Linc Davis,

    Linc Davis Linc Davis Oct 13, 2014 4:57 PM in response to Tyczar92
    Level 10 (207,926 points)
    Applications
    Oct 13, 2014 4:57 PM in response to Tyczar92

    You have the MacBookPro6,2—the Edsel of Macs. It may have the logic-board defect that was covered by this recall.

    Make a "Genius" appointment at an Apple Store, or go to another authorized service provider, to have the machine tested. The routine hardware diagnostics used by service providers do not detect the fault. There is a specific test for this issue that Apple calls "VST" (for "Video Switching Test.") Ask for it. A "Failed" result means that the fault is present. However, according to reports, some units may pass the test, and yet still be deemed eligible for repair under the program. Your experience may vary.

    Print the first page of the panic report, if any, and the support page linked above, and bring them with you.

    Note that the recall only applies within three years of purchase. After that, Apple may refuse the service. In that case, you may be quoted a price of about $300 (in the U.S.) for a "depot repair," which involves shipping the unit to a central repair facility and takes about two weeks. For that flat fee, anything found wrong with it should be fixed, not just the logic board.

    The model was discontinued on February 24, 2011, so the recall has nominally ended. Some units may have been sold after that date by Apple as refurbished, or by resellers as new, and they might still be covered.

    Some owners report that their unit was repaired under the program after the deadline had passed. Others report that the repair was covered by the extended warranty from a credit-card issuer. Again, your experience may vary.

    Sometimes the replacement part is also defective, so be prepared for that possibility. If you decide to pay for a new logic board, test thoroughly during the 90-day warranty period on the repair. Some owners have reported that they went through as many as three replacement boards before getting one that worked.

    If it's too late for your unit to be repaired free of charge, and you don't want to pay for the service, you may (or may not) be able to stop the panics by disabling automatic graphics switching. To use the discrete graphics processor, you'll need a third-party utility to switch to it manually.

    Often the problems start after an OS upgrade. If the upgrade was recent, and you have backups, then you can revert to a previous OS X version.

    If you're dissatisfied with Apple's response, please keep in mind that no one here represents the company or can help with customer-service issues.

    Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.

    *An SSD doesn't need to be zeroed.