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How can I find out what is causing my MacBook Pro to crash from time to time?

Last couple of weeks it has happened several (15+) times that my MacBook Pro suddenly stopped responding. It starts with one or two programs that stop responding then I try to force quit them and then Finder freezes. I'm unable to get out of this freeze to proberly shut down my system so I allways need to force shut down my MB Pro using the fysical power button. Yesterday I was working for 2 hours on a document and I lost it due to my system again freezing up.


How can I find out which soft- or hardware component is causing this?

MacBook Pro, Mac OS X (10.7.3), Intel 320 SSD, 8GB RAM

Posted on Apr 23, 2012 6:28 AM

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Question marked as Best reply

Posted on Apr 23, 2012 7:26 AM

Start by running the extended version of the Apple Hardware Test.


Intel-based Macs: Using Apple Hardware Test

13 replies

Apr 23, 2012 1:52 PM in response to Pieter J.

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.


If you’re running Mac OS X 10.7 or later, open LaunchPad. Click Utilities, then Console in the page that opens.


Step 1


Select "system.log" from the file list. Enter "BOOT_TIME" (without the quotes) in the search box. Note the times of the log messages referring to boot times. Now clear the search box and scroll back in the log to the last boot time when you had the problem. Post the messages logged during the time something abnormal was happening. That time might be before or after the boot.


For example, if the problem is a slow startup taking three minutes, post the messages timestamped within three minutes after the boot time, not before. If the problem is a crash or a shutdown hang, post the messages from before the boot time, when the system was about to crash or was failing to shut down. In either case, please include the BOOT_TIME message at the beginning or the end of the log extract.


Post the log text, please, not a screenshot. If there are runs of repeated messages, post only one example of each. Don’t post many repetitions of the same message.


Some personal information, such as the names of your files, may be included — edit that out, too, but don’t remove the context.


If the log doesn't go back far enough in time, scroll down in the Console file list to /private/var/log/system.log.0.bz2. Search that archived log, and if necessary the older ones below it, for the same information.


Step 2


Do the same with kernel.log.


Step 3


Still in Console, look under System Diagnostic Reports for crash or panic logs, and post the most recent one, if any. For privacy’s sake, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if present (it may not be.) Please don’t post shutdownStall or hang logs — they're very long and not helpful.

Apr 24, 2012 4:17 AM in response to Pieter J.

Pieter J. wrote:


Unless there is a way to check in the logs where I shut my macbook down using the power button, I will await the next time my system freezes to copy those parts of the logs.

Well if you remember the day (date) and approximate time the last freeze happened you can find those logs.


If not then I guess you're going to have to wait.

Apr 24, 2012 4:34 AM in response to Shootist007

The last time I did a complete boot up was right after the crash/freeze. I took the system and kernel logs from a few minutes before:


Kernel.log


Apr 22 20:32:46 Pieters-MacBook-Pro kernel[0]: nspace-handler-set-snapshot-time: 1335119568

Apr 22 20:35:59 Pieters-MacBook-Pro kernel[0]: [BNBMouseDevice][waitForData][34-15-9e-cd-62-16] Timeout waiting for data

Apr 22 20:35:59 Pieters-MacBook-Pro kernel[0]: [BNBMouseDevice][getExtendedReport] getReport returned error e00002d6

Apr 22 20:35:59 Pieters-MacBook-Pro kernel[0]: [BNBMouseDevice][updateBatteryLevel] Couldn't get battery percentage from device

Apr 22 21:32:43 Pieters-MacBook-Pro kernel[0]: nspace-handler-set-snapshot-time: 1335123164

Apr 22 21:36:03 Pieters-MacBook-Pro kernel[0]: [BNBMouseDevice][waitForData][34-15-9e-cd-62-16] Timeout waiting for data

Apr 22 21:36:03 Pieters-MacBook-Pro kernel[0]: [BNBMouseDevice][getExtendedReport] getReport returned error e00002d6

Apr 22 21:36:03 Pieters-MacBook-Pro kernel[0]: [BNBMouseDevice][updateBatteryLevel] Couldn't get battery percentage from device

Apr 22 22:32:44 Pieters-MacBook-Pro kernel[0]: nspace-handler-set-snapshot-time: 1335126765

Apr 22 22:36:06 Pieters-MacBook-Pro kernel[0]: [BNBMouseDevice][waitForData][34-15-9e-cd-62-16] Timeout waiting for data

Apr 22 22:36:06 Pieters-MacBook-Pro kernel[0]: [BNBMouseDevice][getExtendedReport] getReport returned error e00002d6

Apr 22 22:36:06 Pieters-MacBook-Pro kernel[0]: [BNBMouseDevice][updateBatteryLevel] Couldn't get battery percentage from device

Apr 22 22:37:47 Pieters-MacBook-Pro kernel[0]: (default pager): [KERNEL]: ps_select_segment - send HI_WAT_ALERT

Apr 22 22:37:47 Pieters-MacBook-Pro kernel[0]: macx_swapon SUCCESS

Apr 22 22:40:08 Pieters-MacBook-Pro kernel[0]: IOSurface: buffer allocation size is zero

Apr 22 22:44:20 Pieters-MacBook-Pro kernel[0]: IOSurface: buffer allocation size is zero

Apr 22 22:44:50: --- last message repeated 1 time ---

Apr 22 22:44:53 Pieters-MacBook-Pro kernel[0]: IOSurface: buffer allocation size is zero

Apr 22 23:15:18 Pieters-MacBook-Pro kernel[0]: IOSurface: buffer allocation size is zero

Apr 22 23:29:20: --- last message repeated 1 time ---

Apr 22 23:29:20 Pieters-MacBook-Pro kernel[0]: IOSurface: buffer allocation size is zero

Apr 22 23:29:51 Pieters-MacBook-Pro kernel[0]: IOSurface: buffer allocation size is zero

Apr 22 23:32:43 Pieters-MacBook-Pro kernel[0]: nspace-handler-set-snapshot-time: 1335130365


System.log


Apr 22 23:21:04 Pieters-MacBook-Pro librariand[30906]: changing log level to 5

Apr 22 23:21:04 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendAttachNotification (thread 0x7fff76cf7960): sending attach for device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.: _GetAddrInfoReplyReceivedCallback matched.

Apr 22 23:21:04 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendAttachNotification (thread 0x7fff76cf7960): Device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local. has already appeared on interface 4. Suppressing duplicate attach notification.

Apr 22 23:21:05 Pieters-MacBook-Pro usbmuxd[42]: _AMDeviceConnectByAddressAndPort (thread 0x100781000): IPv4

Apr 22 23:21:05 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x7fff76cf7960): Device 'AMDevice 0x4072c9be0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 181, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:21:05 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x11235a000): Device 'AMDevice 0x403cdaee0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 181, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:21:05 Pieters-MacBook-Pro iTunes[415]: _AMDDeviceAttachedCallbackv3 (thread 0x1160fc000): Device 'AMDevice 0x7ff34ca29cf0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 181, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:21:05 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x11164e000): Device 'AMDevice 0x403c77000 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 181, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:21:16 Pieters-MacBook-Pro Google Chrome[406]: Cannot find function pointer SUMCMPluginFactory for factory C1DF11E5-FD12-45AD-BBE4-EE058CB88A16 in CFBundle/CFPlugIn 0x69bcf380 </Library/Contextual Menu Items/Sophos Anti-Virus.plugin> (not loaded)

Apr 22 23:21:35 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendDetachNotification (thread 0x7fff76cf7960): sending detach for device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.: _BrowseReplyReceivedCallback got bonjour removal.

Apr 22 23:21:35 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x7fff76cf7960): Device 'AMDevice 0x4072c9be0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 181, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:21:35 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x11235a000): Device 'AMDevice 0x403cdaee0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 181, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:21:35 Pieters-MacBook-Pro iTunes[415]: _AMDDeviceDetached (thread 0x1160fc000): Device 'AMDevice 0x7ff34ca29cf0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 181, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:21:35 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x11164e000): Device 'AMDevice 0x403c77000 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 181, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:21:35 Pieters-MacBook-Pro Xcode[408]: _NotificationSocketReadCallbackGCD (thread 0x1139b1000): Unexpected connection closure...

Apr 22 23:21:35 Pieters-MacBook-Pro com.apple.usbmuxd[42]: HandleUSBMuxConnect Client 0x1025ed6c0-Xcode/com.apple.dt.Xcode requesting attach to 0xb5:62078 failed, no such device

Apr 22 23:21:35 Pieters-MacBook-Pro Xcode[408]: AMDeviceConnect (thread 0x11164e000): Could not connect to lockdown port (62078) on device 181 - e30d27cbe3b597d3496a6b43a087cd5f475d6b82: 0xe800006b.

Apr 22 23:21:35 Pieters-MacBook-Pro Xcode[408]: Result for ‘/SourceCache/DTDeviceKit/DTDeviceKit-1196/DTDeviceKitBase/DTDeviceKitBase_Util ities.m’ at 592 : 0xE800006B

Apr 22 23:26:08 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendAttachNotification (thread 0x7fff76cf7960): sending attach for device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.: _GetAddrInfoReplyReceivedCallback matched.

Apr 22 23:26:08 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendAttachNotification (thread 0x7fff76cf7960): Device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local. has already appeared on interface 4. Suppressing duplicate attach notification.

Apr 22 23:26:08 Pieters-MacBook-Pro usbmuxd[42]: _AMDeviceConnectByAddressAndPort (thread 0x100781000): IPv4

Apr 22 23:26:08 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x7fff76cf7960): Device 'AMDevice 0x40a11a360 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 182, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:26:08 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x11235a000): Device 'AMDevice 0x4075acf60 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 182, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:26:08 Pieters-MacBook-Pro iTunes[415]: _AMDDeviceAttachedCallbackv3 (thread 0x1160fc000): Device 'AMDevice 0x7ff34c8c5b80 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 182, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:26:08 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x11164e000): Device 'AMDevice 0x403c83940 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 182, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:26:44 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendDetachNotification (thread 0x7fff76cf7960): sending detach for device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.: _BrowseReplyReceivedCallback got bonjour removal.

Apr 22 23:26:44 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x7fff76cf7960): Device 'AMDevice 0x40a11a360 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 182, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:26:44 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x11235a000): Device 'AMDevice 0x4075acf60 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 182, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:26:44 Pieters-MacBook-Pro iTunes[415]: _AMDDeviceDetached (thread 0x1160fc000): Device 'AMDevice 0x7ff34c8c5b80 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 182, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:26:44 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x11164e000): Device 'AMDevice 0x403c83940 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 182, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:26:44 Pieters-MacBook-Pro Xcode[408]: _NotificationSocketReadCallbackGCD (thread 0x119699000): Unexpected connection closure...

Apr 22 23:26:44 Pieters-MacBook-Pro com.apple.usbmuxd[42]: HandleUSBMuxConnect Client 0x1025e1810-Xcode/com.apple.dt.Xcode requesting attach to 0xb6:62078 failed, no such device

Apr 22 23:26:44 Pieters-MacBook-Pro Xcode[408]: AMDeviceConnect (thread 0x11164e000): Could not connect to lockdown port (62078) on device 182 - e30d27cbe3b597d3496a6b43a087cd5f475d6b82: 0xe800006b.

Apr 22 23:26:44 Pieters-MacBook-Pro Xcode[408]: Result for ‘/SourceCache/DTDeviceKit/DTDeviceKit-1196/DTDeviceKitBase/DTDeviceKitBase_Util ities.m’ at 592 : 0xE800006B

_GetAddrInfoReplyReceivedCallback matched.

Apr 22 23:29:04 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendAttachNotification (thread 0x7fff76cf7960): Device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local. has already appeared on interface 4. Suppressing duplicate attach notification.

Apr 22 23:29:05 Pieters-MacBook-Pro usbmuxd[42]: _AMDeviceConnectByAddressAndPort (thread 0x100781000): IPv4

Apr 22 23:29:05 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x7fff76cf7960): Device 'AMDevice 0x4072c9be0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 183, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:29:05 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x11235a000): Device 'AMDevice 0x403cdaee0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 183, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:29:05 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x11164e000): Device 'AMDevice 0x403c7cce0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 183, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:29:05 Pieters-MacBook-Pro iTunes[415]: _AMDDeviceAttachedCallbackv3 (thread 0x1160fc000): Device 'AMDevice 0x7ff34ca28ae0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 183, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:29:17 Pieters-MacBook-Pro Google Chrome[406]: Cannot find function pointer SUMCMPluginFactory for factory C1DF11E5-FD12-45AD-BBE4-EE058CB88A16 in CFBundle/CFPlugIn 0x69bcf380 </Library/Contextual Menu Items/Sophos Anti-Virus.plugin> (not loaded)

Apr 22 23:29:35 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendDetachNotification (thread 0x7fff76cf7960): sending detach for device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.: _BrowseReplyReceivedCallback got bonjour removal.

Apr 22 23:29:35 Pieters-MacBook-Pro iTunes[415]: _AMDDeviceDetached (thread 0x1160fc000): Device 'AMDevice 0x7ff34ca28ae0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 183, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:29:35 Pieters-MacBook-Pro Xcode[408]: _NotificationSocketReadCallbackGCD (thread 0x119699000): Unexpected connection closure...

Apr 22 23:29:35 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x7fff76cf7960): Device 'AMDevice 0x4072c9be0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 183, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:29:35 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x11235a000): Device 'AMDevice 0x403cdaee0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 183, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:29:35 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x11164e000): Device 'AMDevice 0x403c7cce0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 183, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:29:35 Pieters-MacBook-Pro com.apple.usbmuxd[42]: HandleUSBMuxConnect Client 0x1025f06e0-Xcode/com.apple.dt.Xcode requesting attach to 0xb7:62078 failed, no such device

Apr 22 23:29:35 Pieters-MacBook-Pro Xcode[408]: AMDeviceConnect (thread 0x11164e000): Could not connect to lockdown port (62078) on device 183 - e30d27cbe3b597d3496a6b43a087cd5f475d6b82: 0xe800006b.

Apr 22 23:29:35 Pieters-MacBook-Pro Xcode[408]: Result for ‘/SourceCache/DTDeviceKit/DTDeviceKit-1196/DTDeviceKitBase/DTDeviceKitBase_Util ities.m’ at 592 : 0xE800006B

Apr 22 23:29:43 Pieters-MacBook-Pro Google Chrome[406]: Cannot find function pointer SUMCMPluginFactory for factory C1DF11E5-FD12-45AD-BBE4-EE058CB88A16 in CFBundle/CFPlugIn 0x69bcf380 </Library/Contextual Menu Items/Sophos Anti-Virus.plugin> (not loaded)

Apr 22 23:30:05 Pieters-MacBook-Pro librariand[30919]: changing log level to 5

Apr 22 23:30:20 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendAttachNotification (thread 0x7fff76cf7960): sending attach for device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.: _GetAddrInfoReplyReceivedCallback matched.

Apr 22 23:30:20 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendAttachNotification (thread 0x7fff76cf7960): Device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local. has already appeared on interface 4. Suppressing duplicate attach notification.

Apr 22 23:30:21 Pieters-MacBook-Pro usbmuxd[42]: _AMDeviceConnectByAddressAndPort (thread 0x100781000): IPv4

Apr 22 23:30:21 Pieters-MacBook-Pro iTunes[415]: _AMDDeviceAttachedCallbackv3 (thread 0x1160fc000): Device 'AMDevice 0x7ff34c8215d0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 184, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:30:21 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x11164e000): Device 'AMDevice 0x40a11a360 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 184, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:30:21 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x7fff76cf7960): Device 'AMDevice 0x4075acf60 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 184, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:30:21 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceAttachedCallbackv3 (thread 0x11235a000): Device 'AMDevice 0x4016e7640 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 184, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' attached.

Apr 22 23:30:51 Pieters-MacBook-Pro com.apple.usbmuxd[42]: _SendDetachNotification (thread 0x7fff76cf7960): sending detach for device 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.: _BrowseReplyReceivedCallback got bonjour removal.

Apr 22 23:30:51 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x7fff76cf7960): Device 'AMDevice 0x4075acf60 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 184, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:30:51 Pieters-MacBook-Pro Xcode[408]: _NotificationSocketReadCallbackGCD (thread 0x1104b6000): Unexpected connection closure...

Apr 22 23:30:51 Pieters-MacBook-Pro iTunes[415]: _AMDDeviceDetached (thread 0x1160fc000): Device 'AMDevice 0x7ff34c8215d0 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 184, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:30:51 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x11164e000): Device 'AMDevice 0x40a11a360 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 184, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:30:51 Pieters-MacBook-Pro Xcode[408]: _AMDDeviceDetached (thread 0x11235a000): Device 'AMDevice 0x4016e7640 {UDID = e30d27cbe3b597d3496a6b43a087cd5f475d6b82, device ID = 184, FullServiceName = 7c:c5:37:13:25:d7@fe80::7ec5:37ff:fe13:25d7._apple-mobdev._tcp.local.}' detached.

Apr 22 23:30:51 Pieters-MacBook-Pro com.apple.usbmuxd[42]: HandleUSBMuxConnect Client 0x1003f93b0-Xcode/com.apple.dt.Xcode requesting attach to 0xb8:62078 failed, no such device

Apr 22 23:30:51 Pieters-MacBook-Pro Xcode[408]: AMDeviceConnect (thread 0x11164e000): Could not connect to lockdown port (62078) on device 184 - e30d27cbe3b597d3496a6b43a087cd5f475d6b82: 0xe800006b.

Apr 22 23:30:51 Pieters-MacBook-Pro Xcode[408]: Result for ‘/SourceCache/DTDeviceKit/DTDeviceKit-1196/DTDeviceKitBase/DTDeviceKitBase_Util ities.m’ at 592 : 0xE800006B

Apr 22 23:32:41 Pieters-MacBook-Pro com.apple.backupd[30924]: Starting standard backup

Apr 22 23:32:41 Pieters-MacBook-Pro FindSystemFiles[30925]: Looking for system packages

Apr 22 23:32:41 Pieters-MacBook-Pro com.apple.mtmd[25565]: 2012-04-22 23:32:41.769 FindSystemFiles[30925:f07] Looking for system packages

Apr 22 23:32:42 Pieters-MacBook-Pro FindSystemFiles[30925]: Using system path cache v`57'.

Apr 22 23:32:42 Pieters-MacBook-Pro com.apple.mtmd[25565]: 2012-04-22 23:32:42.213 FindSystemFiles[30925:f07] Using system path cache v`57'.

Apr 22 23:32:43 Pieters-MacBook-Pro mtmd[25565]: Set snapshot time:1335130365 (current time:1335130363)

Apr 22 23:32:44 Pieters-MacBook-Pro com.apple.backupd[30924]: Backing up to: /Volumes/The Other Drive/Backups.backupdb

Apr 22 23:32:44 Pieters-MacBook-Pro FindSystemFiles[30930]: Looking for system packages

Apr 22 23:32:44 Pieters-MacBook-Pro com.apple.backupd[30924]: 2012-04-22 23:32:44.154 FindSystemFiles[30930:f07] Looking for system packages

Apr 22 23:32:44 Pieters-MacBook-Pro FindSystemFiles[30930]: Using system path cache v`57'.

Apr 22 23:32:44 Pieters-MacBook-Pro com.apple.backupd[30924]: 2012-04-22 23:32:44.334 FindSystemFiles[30930:f07] Using system path cache v`57'.

Apr 22 23:33:05 Pieters-MacBook-Pro librariand[30934]: changing log level to 5

How can I find out what is causing my MacBook Pro to crash from time to time?

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