My mac air won't start up.it is frozen right before the log on screen. It shut down fine the time before, what should I do? Does it have a safe mode like windows?

My Mac book air wont start up.it is freezing up right before the log on screen. It shut down properly. I cant figure out what could of caused this. Any advice would be greatly appreciated.

Hi Justin,
Are you getting to the Login screen? Or is freezing up on a blue screen? Are you still at the gray screen? Run any updates recently?
You can try Safe Boot/Mode and see if that does anything - http://support.apple.com/kb/ht1455
The next step would be to try and verify/repair Disk Permissions, but you'll need access to another computer for DVD/CD sharing or an external DVD drive.

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http://support.apple.com/kb/TS2570

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The article linked below provides some useful troubleshooting steps that can help get your MacBook Air to boot.
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http://support.apple.com/kb/HT1573
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Hi all, my mac air does not start up normally. After a minute or so after I press the on button a message (in 5 languages ) comes up saying I need to restart the computer by holding down the power key and pressing again , but it keeps doing it. I took it to a mac store and a guy strt it up by holding the alt key after he press the power button on. He checked that everything was alright and deleted few programs and then it all worked fine and he restarted the computer and everything was fine.
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Hi Linc , thank you . This is the report: Hope you can help.
Interval Since Last Panic Report: 850970 sec
Panics Since Last Report: 2
Anonymous UUID:
Fri Aug 22 12:21:08 2014
panic(cpu 1 caller 0xffffff80002a7fbe): "TLB invalidation IPI timeout: " "CPU(s) failed to respond to interrupts, unresponsive CPU bitmap: 0x1, NMIPI acks: orig: 0x0, now: 0x0"@/SourceCache/xnu/xnu-1699.32.7/osfmk/x86_64/pmap.c:2184
Backtrace (CPU 1), Frame : Return Address
0xffffff80572939d0 : 0xffffff8000220792
0xffffff8057293a50 : 0xffffff80002a7fbe
0xffffff8057293ac0 : 0xffffff80002ab6a7
0xffffff8057293b60 : 0xffffff80002abeca
0xffffff8057293ba0 : 0xffffff80002a71da
0xffffff8057293cc0 : 0xffffff800026a64f
0xffffff8057293dc0 : 0xffffff800026cdd4
0xffffff8057293f40 : 0xffffff80002c3fbb
0xffffff8057293fb0 : 0xffffff80002da481
BSD process name corresponding to current thread: loginwindow
Mac OS version:
11G63
Kernel version:
Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64
Kernel UUID: FF3BB088-60A4-349C-92EA-CA649C698CE5
System model name: MacBookAir2,1 (Mac-F42D88C8)
System uptime in nanoseconds: 4247268468908
last loaded kext at 381278027392: com.apple.filesystems.smbfs 1.7.2 (addr 0xffffff7f807f7000, size 241664)
last unloaded kext at 420426404341: com.apple.driver.AppleUSBTCKeyEventDriver 227.6 (addr 0xffffff7f82167000, size 8192)
loaded kexts:
com.apple.filesystems.smbfs 1.7.2
com.apple.iokit.SCSITaskUserClient 3.2.1
com.apple.driver.AppleHWSensor 1.9.5d0
com.apple.iokit.IOBluetoothSerialManager 4.0.8f17
com.apple.driver.AudioAUUC 1.59
com.apple.driver.ApplePlatformEnabler 2.0.5d3
com.apple.driver.AGPM 100.12.75
com.apple.filesystems.autofs 3.0
com.apple.driver.AppleHDA 2.2.5a5
com.apple.driver.AppleLPC 1.6.0
com.apple.driver.SMCMotionSensor 3.0.2d6
com.apple.driver.AppleSMCLMU 2.0.1d2
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AudioIPCDriver 1.2.3
com.apple.driver.ApplePolicyControl 3.1.33
com.apple.driver.AppleUpstreamUserClient 3.5.9
com.apple.GeForce 7.3.2
com.apple.driver.ACPI_SMC_PlatformPlugin 5.0.0d8
com.apple.driver.AppleBacklight 170.2.2
com.apple.driver.AppleMCCSControl 1.0.33
com.apple.driver.AppleUSBTCButtons 227.6
com.apple.driver.BroadcomUSBBluetoothHCIController 4.0.8f17
com.apple.driver.AppleUSBTCKeyboard 227.6
com.apple.driver.AppleIRController 312
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 33
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.1.0
com.apple.driver.AirPortBrcm43224 501.36.15
com.apple.driver.AppleAHCIPort 2.3.1
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleUSBHub 5.1.0
com.apple.driver.AppleUSBEHCI 5.1.0
com.apple.driver.AppleUSBOHCI 5.1.0
com.apple.driver.AppleEFINVRAM 1.6.1
com.apple.driver.AppleRTC 1.5
com.apple.driver.AppleHPET 1.7
com.apple.driver.AppleACPIButtons 1.5
com.apple.driver.AppleSMBIOS 1.9
com.apple.driver.AppleACPIEC 1.5
com.apple.driver.AppleAPIC 1.6
com.apple.driver.AppleIntelCPUPowerManagementClient 195.0.0
com.apple.nke.applicationfirewall 3.2.30
com.apple.security.quarantine 1.4
com.apple.security.TMSafetyNet 8
com.apple.driver.AppleIntelCPUPowerManagement 195.0.0
com.apple.iokit.IOSCSIBlockCommandsDevice 3.2.1
com.apple.iokit.IOUSBMassStorageClass 3.0.3
com.apple.iokit.IOSerialFamily 10.0.5
com.apple.kext.triggers 1.0
com.apple.driver.DspFuncLib 2.2.5a5
com.apple.iokit.IOSurface 80.0.2
com.apple.iokit.IOAudioFamily 1.8.6fc18
com.apple.kext.OSvKernDSPLib 1.3
com.apple.nvidia.nv50hal 7.3.2
com.apple.NVDAResman 7.3.2
com.apple.driver.AppleHDAController 2.2.5a5
com.apple.iokit.IOHDAFamily 2.2.5a5
com.apple.driver.AppleSMC 3.1.3d10
com.apple.driver.IOPlatformPluginLegacy 5.0.0d8
com.apple.driver.IOPlatformPluginFamily 5.1.1d6
com.apple.driver.AppleGraphicsControl 3.1.33
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.iokit.IONDRVSupport 2.3.4
com.apple.driver.AppleSMBusController 1.0.10d0
com.apple.iokit.IOGraphicsFamily 2.3.4
com.apple.iokit.IOSCSIArchitectureModelFamily 3.2.1
com.apple.driver.AppleUSBBluetoothHCIController 4.0.8f17
com.apple.iokit.IOBluetoothFamily 4.0.8f17
com.apple.driver.AppleUSBMultitouch 230.5
com.apple.iokit.IOUSBHIDDriver 5.0.0
com.apple.driver.AppleUSBMergeNub 5.1.0
com.apple.driver.AppleUSBComposite 5.0.0
com.apple.iokit.IO80211Family 420.3
com.apple.iokit.IONetworkingFamily 2.1
com.apple.iokit.IOAHCIFamily 2.0.8
com.apple.iokit.IOUSBUserClient 5.0.0
com.apple.iokit.IOUSBFamily 5.1.0
com.apple.driver.NVSMU 2.2.9
com.apple.driver.AppleEFIRuntime 1.6.1
com.apple.iokit.IOHIDFamily 1.7.1
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 177.11
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.DiskImages 331.7
com.apple.iokit.IOStorageFamily 1.7.2
com.apple.driver.AppleKeyStore 28.18
com.apple.driver.AppleACPIPlatform 1.5
com.apple.iokit.IOPCIFamily 2.7
com.apple.iokit.IOACPIFamily 1.4
Model: MacBookAir2,1, BootROM MBA21.0075.B03, 2 processors, Intel Core 2 Duo, 1.86 GHz, 2 GB, SMC 1.34f8
Graphics: NVIDIA GeForce 9400M, NVIDIA GeForce 9400M, PCI, 256 MB
Memory Module: BANK 0/BuiltIn0, 1 GB, DDR3, 1067 MHz, 0x802C, N/A
Memory Module: BANK 0/BuiltIn1, 1 GB, DDR3, 1067 MHz, 0x802C, N/A
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x90), Broadcom BCM43xx 1.0 (5.10.131.36.15)
Bluetooth: Version 4.0.8f17, 2 service, 18 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en0
Serial ATA Device: SAMSUNG HS12UHE, 120.03 GB
USB Device: Built-in iSight, apple_vendor_id, 0x8505, 0x24400000 / 2
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0224, 0x04600000 / 3
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x04500000 / 2
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x06100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8216, 0x06110000 / 5

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