HI
Finally It crashes even if without extension.
I wasn't able to recover the log, still no new kernel report.
What I bring here is from the general message section just before the crash.
There is still this xpcproxy assertion failed which seems to be the common error in all crashes. Is there a way to identify the process involved here like by exploring the log at the exact time of error and see what process match with the 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210] address ????
thx
23/03/2016 17:29:09,000 kernel[0]: process ScreenSaverEngin[882] thread 22724 caught burning CPU! It used more than 50% CPU (Actual recent usage: 75%) over 180 seconds. thread lifetime cpu usage 90.102096 seconds, (89.934473 user, 0.167623 system) ledger info: balance: 90008120771 credit: 90008120771 debit: 0 limit: 90000000000 (50%) period: 180000000000 time since last refill (ns): 119817485677
23/03/2016 17:29:09,574 ReportCrash[883]: Invoking spindump for pid=882 thread=22724 percent_cpu=75 duration=120 because of excessive cpu utilization
23/03/2016 17:29:10,303 spindump[884]: Error loading dyld shared cache uuid 00000000-0000-0000-0000-000000000000: 0x8
23/03/2016 17:29:10,760 spindump[884]: Saved cpu_resource.spin report for ScreenSaverEngine version 5.0 (5.0) to /Library/Logs/DiagnosticReports/ScreenSaverEngine_2016-03-23-172910_Mac-Pro-de- paul-.cpu_resource.spin
23/03/2016 17:41:09,474 xpcproxy[892]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
23/03/2016 17:59:21,793 xpcproxy[897]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
23/03/2016 18:16:21,610 xpcproxy[905]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
23/03/2016 18:34:11,104 xpcproxy[911]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
23/03/2016 18:36:41,220 ntpd[90]: SYNC state ignoring -0.129942 s
23/03/2016 18:51:21,720 xpcproxy[917]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
23/03/2016 18:52:44,016 ntpd[90]: ntpd: time set -0.150800 s
23/03/2016 18:52:44,035 com.apple.time[465]: Interval maximum value is 946100000 seconds (specified value: 9223372036854775807).
23/03/2016 19:22:13,000 kernel[0]: hfs: mounted Recovery HD on device disk0s3
23/03/2016 19:22:13,906 fseventsd[64]: Logging disabled completely for device:1: /Volumes/Recovery HD
23/03/2016 19:22:13,910 mds[54]: (Normal) Volume: volume:0x7fb45400c000 ********** Bootstrapped Creating a default store:0 SpotLoc:(null) SpotVerLoc:(null) occlude:0 /Volumes/Recovery HD
23/03/2016 19:22:13,000 kernel[0]: hfs: unmount initiated on Recovery HD on device disk0s3
23/03/2016 19:30:33,971 apsd[77]: Unrecognized leaf certificate
23/03/2016 19:35:54,000 kernel[0]: process ScreenSaverEngin[948] thread 38053 caught burning CPU! It used more than 50% CPU (Actual recent usage: 74%) over 180 seconds. thread lifetime cpu usage 90.033319 seconds, (89.488777 user, 0.544542 system) ledger info: balance: 90004462896 credit: 90004462896 debit: 0 limit: 90000000000 (50%) period: 180000000000 time since last refill (ns): 120222281631
23/03/2016 19:35:54,868 ReportCrash[949]: Invoking spindump for pid=948 thread=38053 percent_cpu=74 duration=122 because of excessive cpu utilization
23/03/2016 19:35:56,300 spindump[950]: Error loading dyld shared cache uuid 00000000-0000-0000-0000-000000000000: 0x8
23/03/2016 19:35:56,714 spindump[950]: Saved cpu_resource.spin report for ScreenSaverEngine version 5.0 (5.0) to /Library/Logs/DiagnosticReports/ScreenSaverEngine_2016-03-23-193556_Mac-Pro-de- paul-.cpu_resource.spin
23/03/2016 19:38:04,315 com.apple.authd[36]: Sandbox denied authorizing right 'system.install.app-store-software.standard-user' for authorization created by '/System/Library/CoreServices/Software Update.app/Contents/Resources/SoftwareUpdateConfigData' [954]
23/03/2016 19:38:04,420 sandboxd[227]: ([954]) SoftwareUpdateCo(954) deny authorization-right-obtain system.install.app-store-software.standard-user
23/03/2016 19:38:05,706 com.apple.launchd[1]: (com.apple.security.syspolicy[555]) Exited: Terminated: 15
23/03/2016 19:38:10,753 com.apple.SecurityServer[13]: Killing auth hosts
23/03/2016 19:38:10,753 com.apple.SecurityServer[13]: Session 100021 destroyed
23/03/2016 19:39:57,371 xpchelper[981]: Info.plist does not contain an XPCService dictionary: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/C/PKInstallSandboxManage r/38665ECA-6079-40BB-A5AC-0E8CD04B92D0.activeSandbox/Root/System/Library/Framewo rks/Security.framework/Versions/A/XPCServices/SecurityAgent.xpc
23/03/2016 19:40:00,354 parentalcontrolsd[984]: StartObservingFSEvents [849:] -- *** StartObservingFSEvents started event stream
23/03/2016 19:41:49,516 sandboxd[227]: ([128]) netbiosd(128) deny file-read-metadata /private/var/empty
23/03/2016 19:44:21,818 xpcproxy[986]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
23/03/2016 20:01:21,919 xpcproxy[990]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
23/03/2016 20:16:21,881 xpcproxy[994]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
23/03/2016 20:21:53,872 periodic-wrapper[996]: Running weekly periodic task.
23/03/2016 20:21:53,872 periodic-wrapper[995]: Running daily periodic task.
23/03/2016 20:32:29,011 ntpd[90]: SYNC state ignoring -0.164485 s
23/03/2016 20:34:11,318 xpcproxy[1088]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2