I updated to Yosemite and now I can't restart my macbook air

since the update i found that my macbook started lagging a lot more than it used to, but now it can't even be restarted or switched off. Everything disappears except the icons at the bottom of the screen and then nothing happens. Pressing the switch off button for 3-4 seconds helps. but i don't want to turn off my mac this way. Does anyone have such an issue with yosemite?

STEP 1
11/2/14 5:11:07.463 PM sharingd[316]: 17:11:07.462 : Stopping Handoff advertising
11/2/14 5:11:08.497 PM com.apple.xpc.launchd[1]: (com.teamviewer.service[703]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer 8/TeamViewer.app/Contents/Resources: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
11/2/14 5:11:08.497 PM com.apple.xpc.launchd[1]: (com.teamviewer.service) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
11/2/14 5:11:15.346 PM com.apple.xpc.launchd[1]: (com.teamviewer.teamviewer[705]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer 8/TeamViewer.app/Contents/MacOS: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
11/2/14 5:11:15.346 PM com.apple.xpc.launchd[1]: (com.teamviewer.desktop[706]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer 8/TeamViewer.app/Contents/Resources: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
11/2/14 5:11:15.347 PM com.apple.xpc.launchd[1]: (com.teamviewer.teamviewer) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
11/2/14 5:11:15.347 PM com.apple.xpc.launchd[1]: (com.teamviewer.desktop) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
11/2/14 5:11:16.456 PM sharingd[316]: 17:11:16.455 : Stopping Handoff advertising
11/2/14 5:11:17.932 PM sharingd[316]: 17:11:17.932 : Stopping Handoff advertising
11/2/14 5:11:18.500 PM com.apple.xpc.launchd[1]: (com.teamviewer.service[707]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer 8/TeamViewer.app/Contents/Resources: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
11/2/14 5:11:18.500 PM com.apple.xpc.launchd[1]: (com.teamviewer.service) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
11/2/14 5:11:19.938 PM sharingd[316]: 17:11:19.937 : Stopping Handoff advertising
11/2/14 5:11:25.357 PM com.apple.xpc.launchd[1]: (com.teamviewer.teamviewer[708]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer 8/TeamViewer.app/Contents/MacOS: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
11/2/14 5:11:25.357 PM com.apple.xpc.launchd[1]: (com.teamviewer.desktop[709]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer 8/TeamViewer.app/Contents/Resources: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
11/2/14 5:11:25.357 PM com.apple.xpc.launchd[1]: (com.teamviewer.teamviewer) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
11/2/14 5:11:25.357 PM com.apple.xpc.launchd[1]: (com.teamviewer.desktop) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
11/2/14 5:11:28.506 PM com.apple.xpc.launchd[1]: (com.teamviewer.service[710]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer 8/TeamViewer.app/Contents/Resources: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
11/2/14 5:11:28.506 PM com.apple.xpc.launchd[1]: (com.teamviewer.service) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
11/2/14 5:11:35.367 PM com.apple.xpc.launchd[1]: (com.teamviewer.teamviewer[711]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer 8/TeamViewer.app/Contents/MacOS: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
11/2/14 5:11:35.367 PM com.apple.xpc.launchd[1]: (com.teamviewer.desktop[712]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer 8/TeamViewer.app/Contents/Resources: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
11/2/14 5:11:35.367 PM com.apple.xpc.launchd[1]: (com.teamviewer.teamviewer) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
11/2/14 5:11:35.368 PM com.apple.xpc.launchd[1]: (com.teamviewer.desktop) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
11/2/14 5:11:36.679 PM sharingd[316]: 17:11:36.678 : Stopping Handoff advertising
11/2/14 5:11:56.000 PM bootlog[0]: BOOT_TIME 1414937516 0
STEP 2
There was only a panic report starting with "Kernel"
Anonymous UUID:       ***********************
Mon Oct 27 23:38:31 2014
*** Panic Report ***
panic(cpu 0 caller 0xffffff800de1e80a): Kernel trap at 0xffffff800e25bc54, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0xffffff80de9bb000, CR3: 0x0000000010a82000, CR4: 0x00000000001626e0
RAX: 0x0000000000000000, RBX: 0xffffff7f902cdf58, RCX: 0x00000000035d0000, RDX: 0xffffff801f21a7a0
RSP: 0xffffff811786be70, RBP: 0xffffff811786be80, RSI: 0xffffff7f902cdf58, RDI: 0xffffff80de9bb000
R8:  0x0000000000000004, R9:  0xffffff8024580850, R10: 0x0000198be536f722, R11: 0x0000198be49e770c
R12: 0x0000000000000000, R13: 0xffffff800e510688, R14: 0xffffff80de9bb000, R15: 0xffffff7f902cacfc
RFL: 0x0000000000010286, RIP: 0xffffff800e25bc54, CS:  0x0000000000000008, SS:  0x0000000000000010
Fault CR2: 0xffffff80de9bb000, Error code: 0x0000000000000000, Fault CPU: 0x0
Backtrace (CPU 0), Frame : Return Address
0xffffff811786bb20 : 0xffffff800dd3a811
0xffffff811786bba0 : 0xffffff800de1e80a
0xffffff811786bd60 : 0xffffff800de3a443
0xffffff811786bd80 : 0xffffff800e25bc54
0xffffff811786be80 : 0xffffff7f902cad13
0xffffff811786bea0 : 0xffffff800e2db3cd
0xffffff811786bf00 : 0xffffff800dd6be13
0xffffff811786bfb0 : 0xffffff800de192c7
      Kernel Extensions in backtrace:
         com.apple.driver.AppleUSBCDCECMData(4.2.2b5)[762A4700-2305-3989-8E9B-D107BDB0A4 7E]@0xffffff7f902c9000->0xffffff7f902cffff
            dependency: com.apple.iokit.IONetworkingFamily(3.2)[247581D8-DFC5-3AAE-B079-3D13F5514C2B]@0 xffffff7f8e991000
            dependency: com.apple.iokit.IOUSBFamily(705.4.14)[E15E9DC8-410F-3612-8371-E5FECD939E0D]@0xf fffff7f8e56b000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
14A389
Kernel version:
Darwin Kernel Version 14.0.0: Fri Sep 19 00:26:44 PDT 2014; root:xnu-2782.1.97~2/RELEASE_X86_64
Kernel UUID: 89E10306-BC78-3A3B-955C-7C4922577E61
Kernel slide:     0x000000000da00000
Kernel text base: 0xffffff800dc00000
__HIB  text base: 0xffffff800db00000
System model name: MacBookAir6,2 (Mac-7DF21CB3ED6977E5)
System uptime in nanoseconds: 28088626889516
last loaded kext at 28087518738264: com.apple.driver.AppleUSBCDCECMData 4.2.2b5 (addr 0xffffff7f902c9000, size 28672)
last unloaded kext at 18926274675736: com.apple.driver.AppleMikeyHIDDriver 124 (addr 0xffffff7f902ba000, size 12288)
loaded kexts:
com.apple.driver.AppleUSBCDCECMData 4.2.2b5
com.apple.driver.AppleUSBCDCACMData 4.2.2b5
com.apple.driver.AppleUSBCDC 4.2.2b5
com.apple.driver.AudioAUUC 1.70
com.apple.driver.AppleUpstreamUserClient 3.6.1
com.apple.driver.AppleHDA 266.5
com.apple.driver.X86PlatformShim 1.0.0
com.apple.driver.AGPM 100.14.37
com.apple.driver.ApplePlatformEnabler 2.1.0d1
com.apple.filesystems.autofs 3.0
com.apple.iokit.IOBluetoothSerialManager 4.3.0f10
com.apple.driver.AppleOSXWatchdog 1
com.apple.driver.AppleThunderboltIP 2.0.2
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.3.0f10
com.apple.driver.AppleSMCLMU 2.0.4d1
com.apple.iokit.IOUserEthernet 1.0.1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleHWAccess 1
com.apple.driver.AppleHV 1
com.apple.driver.AppleLPC 1.7.3
com.apple.driver.AppleBacklight 170.4.12
com.apple.driver.AppleMCCSControl 1.2.10
com.apple.driver.AppleIntelHD5000Graphics 10.0.0
com.apple.driver.AppleCameraInterface 5.23.0
com.apple.driver.AppleIntelFramebufferAzul 10.0.0
com.apple.driver.AppleUSBCardReader 3.5.0
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 35
com.apple.driver.AppleTopCaseHIDEventDriver 46.2
com.apple.driver.AppleUSBHub 705.4.1
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.6.5
com.apple.driver.AppleAHCIPort 3.0.7
com.apple.driver.AirPort.Brcm4360 900.19.8
com.apple.driver.AppleUSBXHCI 705.4.14
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleACPIButtons 3.1
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleSMBIOS 2.1
com.apple.driver.AppleACPIEC 3.1
com.apple.driver.AppleAPIC 1.7
com.apple.nke.applicationfirewall 161
com.apple.security.quarantine 3
com.apple.security.TMSafetyNet 8
com.apple.driver.AppleUSBCDCECMControl 4.2.2b5
com.apple.driver.DspFuncLib 266.5
com.apple.kext.OSvKernDSPLib 1.15
com.apple.iokit.IOAudioFamily 200.6
com.apple.vecLib.kext 1.2.0
com.apple.kext.triggers 1.0
com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.3.0f10
com.apple.iokit.IOBluetoothFamily 4.3.0f10
com.apple.driver.AppleBacklightExpert 1.1.0
com.apple.driver.AppleSMBusController 1.0.13d1
com.apple.iokit.IOSurface 97
com.apple.iokit.IONDRVSupport 2.4.1
com.apple.driver.AppleHDAController 266.5
com.apple.iokit.IOHDAFamily 266.5
com.apple.driver.X86PlatformPlugin 1.0.0
com.apple.driver.IOPlatformPluginFamily 5.8.0d49
com.apple.iokit.IOUSBUserClient 705.4.0
com.apple.driver.AppleSMC 3.1.9
com.apple.iokit.IOSerialFamily 11
com.apple.AppleGraphicsDeviceControl 3.7.21
com.apple.iokit.IOAcceleratorFamily2 156.4
com.apple.iokit.IOGraphicsFamily 2.4.1
com.apple.iokit.IOSCSIBlockCommandsDevice 3.7.0
com.apple.iokit.IOUSBMassStorageClass 3.7.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.7.0
com.apple.driver.AppleUSBMergeNub 705.4.0
com.apple.driver.AppleUSBComposite 705.4.9
com.apple.driver.CoreStorage 471
com.apple.driver.AppleHIDKeyboard 175.5
com.apple.driver.AppleHSSPIHIDDriver 26.2
com.apple.driver.AppleMultitouchDriver 260.30
com.apple.iokit.IOAHCIFamily 2.7.0
com.apple.driver.AppleThunderboltDPInAdapter 4.0.6
com.apple.driver.AppleThunderboltDPAdapterFamily 4.0.6
com.apple.driver.AppleThunderboltPCIDownAdapter 2.0.2
com.apple.driver.AppleThunderboltNHI 3.1.7
com.apple.iokit.IOThunderboltFamily 4.2.1
com.apple.iokit.IO80211Family 700.52
com.apple.driver.mDNSOffloadUserClient 1.0.1b8
com.apple.iokit.IONetworkingFamily 3.2
com.apple.driver.AppleHSSPISupport 26.2
com.apple.driver.AppleIntelLpssSpiController 2.0.45
com.apple.driver.AppleIntelLpssGspi 2.0.45
com.apple.driver.AppleIntelLpssDmac 2.0.45
com.apple.iokit.IOUSBFamily 705.4.14
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 300.0
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.AppleKeyStore 2
com.apple.driver.AppleMobileFileIntegrity 1.0.5
com.apple.driver.AppleCredentialManager 1.0
com.apple.driver.DiskImages 389.1
com.apple.iokit.IOStorageFamily 2.0
com.apple.iokit.IOReportFamily 31
com.apple.driver.AppleFDEKeyStore 28.30
com.apple.driver.AppleACPIPlatform 3.1
com.apple.iokit.IOPCIFamily 2.9
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.corecrypto 1.0
com.apple.kec.Libm 1
com.apple.kec.pthread 1
System Profile:
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x117), Broadcom BCM43xx 1.0 (7.15.124.12.8)
Bluetooth: Version 4.3.0f10 14890, 3 services, 19 devices, 1 incoming serial ports
Thunderbolt Bus: MacBook Air, Apple Inc., 23.6
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x02FE, -
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x02FE, -
USB Device: Internal Memory Card Reader
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
Serial ATA Device: APPLE SSD SM0256F, 251 GB
Model: MacBookAir6,2, BootROM MBA61.0099.B16, 2 processors, Intel Core i7, 1.7 GHz, 8 GB, SMC 2.13f15
Network Service: Wi-Fi, AirPort, en0
Graphics: Intel HD Graphics 5000, Intel HD Graphics 5000, Built-In

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