Q: Why does my mac mini just crash and restart out of the blue:

Anonymous UUID:       0D71B683-99FB-DC7F-EAA2-7A713FAD7D1C

Mon Jun  2 12:19:29 2014

panic(cpu 4 caller 0xffffff80279ba0bd): "kauth_cred_ref: trying to take a reference on a cred with no references"@/SourceCache/xnu/xnu-2422.100.13/bsd/kern/kern_credential.c:4637

Backtrace (CPU 4), Frame : Return Address

0xffffff8212c4bc00 : 0xffffff8027622fa9

0xffffff8212c4bc80 : 0xffffff80279ba0bd

0xffffff8212c4bca0 : 0xffffff8027af0fb0

0xffffff8212c4bd10 : 0xffffff80279d40f4

0xffffff8212c4bf50 : 0xffffff8027a40653

0xffffff8212c4bfb0 : 0xffffff80276f3c56

BSD process name corresponding to current thread: mds_stores

Mac OS version:

13D65

Kernel version:

Darwin Kernel Version 13.2.0: Thu Apr 17 23:03:13 PDT 2014; root:xnu-2422.100.13~1/RELEASE_X86_64

Kernel UUID: ADD73AE6-88B0-32FB-A8BB-4F7C8BE4092E

Kernel slide:     0x0000000027400000

Kernel text base: 0xffffff8027600000

System model name: Macmini6,2 (Mac-F65AE981FFA204ED)

System uptime in nanoseconds: 75692030692505

last loaded kext at 12570322465683: com.apple.filesystems.cddafs          2.6.0 (addr 0xffffff7fa9692000, size 24576)

last unloaded kext at 12634254004347: com.apple.iokit.IOUSBAttachedSCSI          1.0.5 (addr 0xffffff7fa960b000, size 32768)

loaded kexts:

com.apple.iokit.SCSITaskUserClient          3.6.6

com.apple.filesystems.smbfs          2.0.2

com.apple.filesystems.autofs          3.0

com.apple.driver.AppleBluetoothMultitouch          80.14

com.apple.driver.AudioAUUC          1.60

com.apple.iokit.IOBluetoothSerialManager          4.2.4f1

com.apple.driver.AGPM          100.14.15

com.apple.driver.ApplePlatformEnabler          2.0.9d1

com.apple.driver.X86PlatformShim          1.0.0

com.apple.driver.AppleMikeyHIDDriver          124

com.apple.iokit.IOUserEthernet          1.0.0d1

com.apple.driver.AppleUpstreamUserClient          3.5.13

com.apple.driver.AppleMCCSControl          1.1.12

com.apple.driver.AppleHDA          2.6.1f2

com.apple.driver.AppleMikeyDriver          2.6.1f2

com.apple.Dont_Steal_Mac_OS_X          7.0.0

com.apple.driver.AppleIntelHD4000Graphics          8.2.6

com.apple.driver.AppleHWAccess          1

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport          4.2.4f1

com.apple.driver.AppleSMCPDRC          1.0.0

com.apple.driver.AppleLPC          1.7.0

com.apple.driver.AppleIntelFramebufferCapri          8.2.6

com.apple.driver.AppleThunderboltIP          1.1.2

com.apple.driver.AppleUSBODD          3.4.1

com.apple.driver.AppleIRController          325.7

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1

com.apple.BootCache          35

com.apple.driver.XsanFilter          404

com.apple.iokit.IOAHCIBlockStorage          2.5.1

com.apple.driver.AppleUSBHub          666.4.0

com.apple.driver.AppleSDXC          1.5.2

com.apple.iokit.AppleBCM5701Ethernet          3.8.1b2

com.apple.driver.AppleFWOHCI          5.0.2

com.apple.driver.AirPort.Brcm4331          700.20.22

com.apple.driver.AppleAHCIPort          3.0.0

com.apple.driver.AppleUSBEHCI          660.4.0

com.apple.driver.AppleUSBXHCI          677.4.0

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.driver.AppleBluetoothHIDKeyboard          170.15

com.apple.driver.AppleHIDKeyboard          170.15

com.apple.kext.triggers          1.0

com.apple.driver.IOBluetoothHIDDriver          4.2.4f1

com.apple.driver.AppleMultitouchDriver          245.13

com.apple.iokit.IOSerialFamily          10.0.7

com.apple.driver.DspFuncLib          2.6.1f2

com.apple.vecLib.kext          1.0.0

com.apple.iokit.IOAudioFamily          1.9.7fc2

com.apple.kext.OSvKernDSPLib          1.14

com.apple.iokit.IOBluetoothFamily          4.2.4f1

com.apple.driver.AppleSMBusController          1.0.11d1

com.apple.iokit.IOSurface          91.1

com.apple.iokit.IOBluetoothHostControllerUSBTransport          4.2.4f1

com.apple.driver.AppleSMBusPCI          1.0.12d1

com.apple.iokit.IONDRVSupport          2.4.1

com.apple.driver.X86PlatformPlugin          1.0.0

com.apple.driver.IOPlatformPluginFamily          5.7.0d11

com.apple.driver.AppleSMC          3.1.8

com.apple.iokit.IOAcceleratorFamily2          98.20

com.apple.AppleGraphicsDeviceControl          3.5.26

com.apple.iokit.IOFireWireIP          2.2.6

com.apple.driver.AppleHDAController          2.6.1f2

com.apple.iokit.IOGraphicsFamily          2.4.1

com.apple.iokit.IOHDAFamily          2.6.1f2

com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.6.6

com.apple.iokit.IOBDStorageFamily          1.7

com.apple.iokit.IODVDStorageFamily          1.7.1

com.apple.iokit.IOCDStorageFamily          1.7.1

com.apple.iokit.IOUSBMassStorageClass          3.6.0

com.apple.driver.AppleUSBMergeNub          650.4.0

com.apple.driver.AppleThunderboltDPInAdapter          3.1.7

com.apple.driver.AppleThunderboltDPAdapterFamily          3.1.7

com.apple.driver.AppleThunderboltPCIDownAdapter          1.4.5

com.apple.iokit.IOUSBHIDDriver          660.4.0

com.apple.driver.AppleUSBComposite          656.4.1

com.apple.iokit.IOSCSIArchitectureModelFamily          3.6.6

com.apple.driver.AppleThunderboltNHI          2.0.1

com.apple.iokit.IOThunderboltFamily          3.2.7

com.apple.iokit.IOEthernetAVBController          1.0.3b4

com.apple.driver.mDNSOffloadUserClient          1.0.1b5

com.apple.iokit.IOFireWireFamily          4.5.5

com.apple.iokit.IOUSBUserClient          660.4.2

com.apple.iokit.IO80211Family          630.35

com.apple.iokit.IONetworkingFamily          3.2

com.apple.iokit.IOAHCIFamily          2.6.5

com.apple.iokit.IOUSBFamily          677.4.0

com.apple.driver.AppleEFINVRAM          2.0

com.apple.iokit.IOHIDFamily          2.0.0

com.apple.driver.AppleEFIRuntime          2.0

com.apple.iokit.IOSMBusFamily          1.1

com.apple.security.sandbox          278.11

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.pthread          1

com.apple.kec.corecrypto          1.0

Model: Macmini6,2, BootROM MM61.0106.B03, 4 processors, Intel Core i7, 2.3 GHz, 16 GB, SMC 2.8f0

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

Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x029E, 0x434D5358384758334D314131363030433130

Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x029E, 0x434D5358384758334D314131363030433130

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x10E), Broadcom BCM43xx 1.0 (5.106.98.100.22)

Bluetooth: Version 4.2.4f1 13674, 3 services, 23 devices, 1 incoming serial ports

Network Service: Ethernet, Ethernet, en0

Serial ATA Device: APPLE HDD HTS541010A9E662, 1 TB

USB Device: USB3.0 Hub

USB Device: Hub

USB Device: Hub

USB Device: Apple USB SuperDrive

USB Device: USB2.0 Hub

USB Device: Hub

USB Device: IR Receiver

USB Device: BRCM20702 Hub

USB Device: Bluetooth USB Host Controller

Thunderbolt Bus: Mac mini, Apple Inc., 23.4