Macbook Air crashes and restarts

Question

My Macbook Air is constantly (and upredictably) shutting down and restarting. I took it in to a Mac technician and they found nothing wrong with the computer, yet it keeps happening. Below is the error report that I get.Anonymous UUID: 0DD32CF9-C3FC-6BAA-60B3-A78642C385B7Tue Mar 11 19:36:13 2014panic(cpu 0 caller 0xffffff80086b9eec): "complete() while dma active"@/SourceCache/xnu/xnu-2422.90.20/iokit/Kernel/IOMemoryDescriptor.cpp:262 0Backtrace (CPU 0), Frame : Return Address0xffffff800fa43970 : 0xffffff8008222fa9 0xffffff800fa439f0 : 0xffffff80086b9eec 0xffffff800fa43a30 : 0xffffff7f887f6b06 0xffffff800fa43a70 : 0xffffff7f887ecab2 0xffffff800fa43ac0 : 0xffffff7f88b952ca 0xffffff800fa43b10 : 0xffffff7f88b98c3a 0xffffff800fa43b60 : 0xffffff7f888840d4 0xffffff800fa43bb0 : 0xffffff7f8887e14e 0xffffff800fa43c00 : 0xffffff7f8887e21c 0xffffff800fa43c30 : 0xffffff7f88cb57fd 0xffffff800fa43d30 : 0xffffff7f88e1e166 0xffffff800fa43de0 : 0xffffff7f88e1ef51 0xffffff800fa43e20 : 0xffffff7f88e2c83e 0xffffff800fa43ed0 : 0xffffff7f88e34475 0xffffff800fa43ef0 : 0xffffff80086ae020 0xffffff800fa43f30 : 0xffffff80086acac2 0xffffff800fa43f80 : 0xffffff80086acb97 0xffffff800fa43fb0 : 0xffffff80082d6ff7       Kernel Extensions in backtrace: com.apple.iokit.IOStorageFamily(1.9)[9B09B065-7F11-3241-B194-B72E5C23548B]@0xff ffff7f887e9000-&gt;0xffffff7f8880dfff com.apple.iokit.IOUSBFamily(675.4)[5C861553-BC5A-3979-A6B4-58C57879DD40]@0xffff ff7f88cb2000-&gt;0xffffff7f88d12fff dependency: com.apple.iokit.IOPCIFamily(2.9)[EDA75271-4E9D-34E7-A2C5-14F0C8817D37]@0xffffff 7f888bb000 com.apple.driver.AppleUSBXHCI(670.4)[91761100-07BD-32B9-AAE7-6BE5C6623809]@0xff ffff7f88e1d000-&gt;0xffffff7f88e39fff dependency: com.apple.iokit.IOUSBFamily(675.4.0)[5C861553-BC5A-3979-A6B4-58C57879DD40]@0xff ffff7f88cb2000 dependency: com.apple.iokit.IOPCIFamily(2.9)[EDA75271-4E9D-34E7-A2C5-14F0C8817D37]@0xffffff 7f888bb000         com.apple.iokit.IOSCSIArchitectureModelFamily(3.6.6)[C7B04E3E-37FF-3DC4-A0ED-92 DDCE6FCB98]@0xffffff7f88879000-&gt;0xffffff7f888a3fff com.apple.iokit.IOSCSIBlockCommandsDevice(3.6.6)[160F02BC-97C1-3119-BD28-4B2ED1 21C501]@0xffffff7f88b94000-&gt;0xffffff7f88ba8fff dependency: com.apple.iokit.IOSCSIArchitectureModelFamily(3.6.6)[C7B04E3E-37FF-3DC4-A0ED-92 DDCE6FCB98]@0xffffff7f88879000 dependency: com.apple.iokit.IOStorageFamily(1.9)[9B09B065-7F11-3241-B194-B72E5C23548B]@0xff ffff7f887e9000BSD process name corresponding to current thread: kernel_taskMac OS version:13C64Kernel version:Darwin Kernel Version 13.1.0: Thu Jan 16 19:40:37 PST 2014; root:xnu-2422.90.20~2/RELEASE_X86_64Kernel UUID: 9FEA8EDC-B629-3ED2-A1A3-6521A1885953Kernel slide: 0x0000000008000000Kernel text base: 0xffffff8008200000System model name: MacBookAir5,2 (Mac-2E6FAB96566FE58C)System uptime in nanoseconds: 15978426694751last loaded kext at 15504004440780: com.apple.driver.AppleIntelMCEReporter        104 (addr 0xffffff7f8a049000, size 49152)last unloaded kext at 15581594431884: com.apple.driver.AppleIntelMCEReporter    104 (addr 0xffffff7f8a049000, size 32768)loaded kexts:com.apple.iokit.IOUSBAttachedSCSI  1.0.5com.apple.driver.AppleBluetoothMultitouch   80.14com.apple.driver.AudioAUUC  1.60com.apple.filesystems.autofs   3.0com.apple.iokit.IOBluetoothSerialManager    4.2.3f10com.apple.driver.AGPM          100.14.15com.apple.driver.X86PlatformShim    1.0.0com.apple.driver.ApplePlatformEnabler         2.0.9d1com.apple.driver.AppleMikeyHIDDriver           124com.apple.driver.AppleUpstreamUserClient    3.5.13com.apple.iokit.IOUserEthernet           1.0.0d1com.apple.driver.AppleHDA    2.6.0f1com.apple.driver.AppleIntelHD4000Graphics 8.2.4com.apple.driver.AppleMikeyDriver     2.6.0f1com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport       4.2.3f10com.apple.driver.AppleSMCLMU        2.0.4d1com.apple.Dont_Steal_Mac_OS_X    7.0.0com.apple.driver.AppleHWAccess       1com.apple.driver.AppleIntelFramebufferCapri 8.2.4com.apple.driver.AppleSMCPDRC      1.0.0com.apple.driver.AppleLPC    1.7.0com.apple.driver.AppleThunderboltIP            1.1.2com.apple.driver.AppleBacklight        170.3.5com.apple.driver.AppleMCCSControl  1.1.12com.apple.driver.AppleUSBTCButtons            240.2com.apple.driver.AppleUSBTCKeyboard        240.2com.apple.driver.AppleUSBCardReader         3.4.1com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1com.apple.AppleFSCompression.AppleFSCompressionTypeZlib        1.0.0d1com.apple.BootCache            35com.apple.driver.XsanFilter     404com.apple.iokit.IOAHCIBlockStorage  2.5.1com.apple.driver.AppleUSBHub          666.4.0com.apple.driver.AirPort.Brcm4331    700.20.22com.apple.driver.AppleAHCIPort         3.0.0com.apple.driver.AppleUSBXHCI        670.4.0com.apple.driver.AppleUSBEHCI        660.4.0com.apple.driver.AppleSmartBatteryManager 161.0.0com.apple.driver.AppleRTC    2.0com.apple.driver.AppleACPIButtons   2.0com.apple.driver.AppleHPET  1.8com.apple.driver.AppleSMBIOS         2.1com.apple.driver.AppleACPIEC          2.0com.apple.driver.AppleAPIC   1.7com.apple.driver.AppleIntelCPUPowerManagementClient     216.0.0com.apple.nke.applicationfirewall      153com.apple.security.quarantine            3com.apple.driver.AppleIntelCPUPowerManagement  216.0.0com.apple.driver.AppleBluetoothHIDKeyboard           170.15com.apple.driver.AppleHIDKeyboard  170.15com.apple.driver.IOBluetoothHIDDriver           4.2.3f10com.apple.driver.AppleMultitouchDriver         245.13com.apple.kext.triggers            1.0com.apple.iokit.IOSerialFamily           10.0.7com.apple.driver.DspFuncLib  2.6.0f1com.apple.vecLib.kext            1.0.0com.apple.iokit.IOAudioFamily           1.9.5fc2com.apple.kext.OSvKernDSPLib         1.14com.apple.iokit.IOSurface       91com.apple.iokit.IOBluetoothFamily     4.2.3f10com.apple.driver.X86PlatformPlugin  1.0.0com.apple.iokit.IOBluetoothHostControllerUSBTransport        4.2.3f10com.apple.iokit.IOAcceleratorFamily2            98.14com.apple.AppleGraphicsDeviceControl        3.4.35com.apple.driver.AppleSMBusPCI      1.0.12d1com.apple.driver.IOPlatformPluginFamily      5.7.0d10com.apple.driver.AppleHDAController 2.6.0f1com.apple.iokit.IOHDAFamily 2.6.0f1com.apple.driver.AppleSMC   3.1.8com.apple.driver.AppleBacklightExpert          1.0.4com.apple.iokit.IONDRVSupport         2.4.1com.apple.driver.AppleSMBusController         1.0.11d1com.apple.iokit.IOGraphicsFamily      2.4.1com.apple.driver.AppleUSBMultitouch           240.9com.apple.iokit.IOUSBHIDDriver         660.4.0com.apple.driver.AppleThunderboltDPInAdapter        3.1.7com.apple.driver.AppleThunderboltDPAdapterFamily            3.1.7com.apple.driver.AppleThunderboltPCIDownAdapter 1.4.5com.apple.iokit.IOSCSIBlockCommandsDevice          3.6.6com.apple.iokit.IOUSBMassStorageClass        3.6.0com.apple.iokit.IOSCSIArchitectureModelFamily       3.6.6com.apple.driver.AppleUSBMergeNub            650.4.0com.apple.driver.AppleUSBComposite           656.4.1com.apple.driver.AppleThunderboltNHI          2.0.1com.apple.iokit.IOThunderboltFamily 3.2.7com.apple.iokit.IOUSBUserClient        660.4.2com.apple.iokit.IO80211Family          630.35com.apple.iokit.IONetworkingFamily   3.2com.apple.iokit.IOAHCIFamily            2.6.5com.apple.iokit.IOUSBFamily 675.4.0com.apple.driver.AppleEFINVRAM     2.0com.apple.driver.AppleEFIRuntime    2.0com.apple.iokit.IOHIDFamily   2.0.0com.apple.iokit.IOSMBusFamily         1.1com.apple.security.sandbox    278.11com.apple.kext.AppleMatch    1.0.0d1com.apple.security.TMSafetyNet        7com.apple.driver.AppleKeyStore         2com.apple.driver.DiskImages   371.1com.apple.iokit.IOStorageFamily        1.9com.apple.iokit.IOReportFamily          23com.apple.driver.AppleFDEKeyStore  28.30com.apple.driver.AppleACPIPlatform  2.0com.apple.iokit.IOPCIFamily   2.9com.apple.iokit.IOACPIFamily            1.4com.apple.kec.corecrypto       1.0com.apple.kec.pthread            1System Profile:Model: MacBookAir5,2, BootROM MBA51.00EF.B02, 2 processors, Intel Core i5, 1.8 GHz, 4 GB, SMC 2.5f9Graphics: Intel HD Graphics 4000, Intel HD Graphics 4000, Built-In, 1024 MBMemory Module: BANK 0/DIMM0, 2 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3230554638454455302D474E2D4620Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3230554638454455302D474E2D4620AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xE9), Broadcom BCM43xx 1.0 (5.106.98.100.22)Bluetooth: Version 4.2.3f10 13477, 3 services, 23 devices, 1 incoming serial portsNetwork Service: Wi-Fi, AirPort, en0Serial ATA Device: APPLE SSD TS128E, 121.33 GBUSB Device: P9223 SlimUSB Device: HubUSB Device: HubUSB Device: Internal Memory Card ReaderUSB Device: Apple Internal Keyboard / TrackpadUSB Device: BRCM20702 HubUSB Device: Bluetooth USB Host ControllerUSB Device: HubUSB Device: FaceTime HD Camera (Built-in)Thunderbolt Bus: MacBook Air, Apple Inc., 23.4Model: MacBookAir5,2, BootROM MBA51.00EF.B02, 2 processors, Intel Core i5, 1.8 GHz, 4 GB, SMC 2.5f9Graphics: Intel HD Graphics 4000, Intel HD Graphics 4000, Built-In, 1024 MBMemory Module: BANK 0/DIMM0, 2 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3230554638454455302D474E2D4620Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3230554638454455302D474E2D4620AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xE9), Broadcom BCM43xx 1.0 (5.106.98.100.22)Bluetooth: Version 4.2.3f10 13477, 3 services, 23 devices, 1 incoming serial portsNetwork Service: Wi-Fi, AirPort, en0Serial ATA Device: APPLE SSD TS128E, 121.33 GBUSB Device: P9223 SlimUSB Device: HubUSB Device: HubUSB Device: Internal Memory Card ReaderUSB Device: Apple Internal Keyboard / TrackpadUSB Device: BRCM20702 HubUSB Device: Bluetooth USB Host ControllerUSB Device: HubUSB Device: FaceTime HD Camera (Built-in)Thunderbolt Bus: MacBook Air, Apple Inc., 23.4

Kappy · Answer

I can only guess it may have something to do with your external USB drive. If you have any other USB peripherals consider disconnecting them to see if that stops the panics.