Q: EI Capitan 10.11.6 freezing

When I opened some apps, such as Safari, the monitor suddenly became freezing. When I used thunderbolt VGA in my office, everything works well. Once I plug in the thunderbolt, OS X will come back from freezing state.

the following is the system log,

Aug 31 21:46:14 yan com.apple.xpc.launchd[1] (com.teamviewer.desktop): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.

Aug 31 21:46:15 yan WindowServer[179]: _CGXRemoveWindowFromWindowMovementGroup: window 0x3e is not attached to window 0x41

Aug 31 21:46:15 yan com.apple.WebKit.WebContent[1462]: <<<< MediaValidator >>>> mv_ValidateRFC4281CodecId: Unrecognized codec 1.(null). Failed codec specific check.

Aug 31 21:46:15 yan com.apple.WebKit.WebContent[1462]: <<<< MediaValidator >>>> mv_LookupCodecSupport: Unrecognized codec 1

Aug 31 21:46:15 yan com.apple.WebKit.WebContent[1462]: [21:46:15.857] mv_LowLevelCheckIfVideoPlayableUsingDecoder signalled err=-12956 (kFigMediaValidatorError_VideoCodecNotSupported) (video codec 1) at line 1921

Aug 31 21:46:15 yan com.apple.WebKit.WebContent[1462]: <<<< MediaValidator >>>> mv_TestCodecSupportUsingDecoders: Unrecognized codec 1

Aug 31 21:46:15 yan com.apple.WebKit.WebContent[1462]: <<<< MediaValidator >>>> mv_ValidateRFC4281CodecId: Unrecognized codec 1.(null). Failed codec specific check.

Aug 31 21:46:15 yan com.apple.WebKit.WebContent[1462]: <<<< MediaValidator >>>> mv_LookupCodecSupport: Unrecognized codec 1

Aug 31 21:46:15 yan com.apple.WebKit.WebContent[1462]: [21:46:15.941] mv_LowLevelCheckIfVideoPlayableUsingDecoder signalled err=-12956 (kFigMediaValidatorError_VideoCodecNotSupported) (video codec 1) at line 1921

Aug 31 21:46:15 yan com.apple.WebKit.WebContent[1462]: <<<< MediaValidator >>>> mv_TestCodecSupportUsingDecoders: Unrecognized codec 1

Aug 31 21:46:17 yan com.apple.xpc.launchd[1] (com.teamviewer.service[1470]): Service could not initialize: Unable to set current working directory. error = 2: No such file or directory, path = /Applications/TeamViewer.app/Contents/MacOS: 15G31: xpcproxy + 12068 [1343][F7717708-ACF7-307D-B04E-998DFC36598F]: 0x2

Aug 31 21:46:17 yan com.apple.xpc.launchd[1] (com.teamviewer.service): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.

Aug 31 21:46:19 yan WindowServer[179]: Received display connect changed for display 0x42803c2

Aug 31 21:46:19 yan WindowServer[179]: Found 27 modes for display 0x042803c2 [27, 0]

Aug 31 21:46:19 yan WindowServer[179]: Received display connect changed for display 0x3f003f

Aug 31 21:46:19 yan WindowServer[179]: Found 1 modes for display 0x003f003f [1, 0]

Aug 31 21:46:19 yan WindowServer[179]: Received display connect changed for display 0x3f0040

Aug 31 21:46:19 yan WindowServer[179]: Found 1 modes for display 0x003f0040 [1, 0]

Aug 31 21:46:19 yan WindowServer[179]: Received display connect changed for display 0x3f0041

Aug 31 21:46:19 yan WindowServer[179]: Found 1 modes for display 0x003f0041 [1, 0]

Aug 31 21:46:19 yan WindowServer[179]: CGXMuxAcknowledge: Posting glitchless acknowledge

Aug 31 21:46:19 yan kernel[0]: ignored is_io_service_close(0x100000414,IOHIDParamUserClient)

Aug 31 21:46:19 --- last message repeated 4 times ---

Aug 31 21:46:19 yan WindowServer[179]: MPAccessSurfaceForDisplayDevice: Set up page flip mode on display 0x042803c2 device: 0x7fee2ad10ce0 isBackBuffered: 1 numComp: 3 numDisp: 3

Aug 31 21:46:24 yan com.apple.xpc.launchd[1] (com.teamviewer.teamviewer[1473]): Service could not initialize: Unable to set current working directory. error = 2: No such file or directory, path = /Applications/TeamViewer.app/Contents/MacOS: 15G31: xpcproxy + 12068 [1343][F7717708-ACF7-307D-B04E-998DFC36598F]: 0x2

Aug 31 21:46:24 yan com.apple.xpc.launchd[1] (com.teamviewer.desktop[1474]): Service could not initialize: Unable to set current working directory. error = 2: No such file or directory, path = /Applications/TeamViewer.app/Contents/Helpers: 15G31: xpcproxy + 12068 [1343][F7717708-ACF7-307D-B04E-998DFC36598F]: 0x2

Aug 31 21:46:24 yan com.apple.xpc.launchd[1] (com.teamviewer.teamviewer): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.

Aug 31 21:46:24 yan com.apple.xpc.launchd[1] (com.teamviewer.desktop): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.