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Admin User account deleted by MCXCDeleteAccount at shutdown

I have a MacBook Pro that occasionally on shutdown deletes the User Account with admin privileges when I shutdown. The home directory is not deleted, only the account information.The system log segment has the following entries. Any clues to why this would be happening, or how I can stop it from happening again:


1/24/11 6:03:55 PM login[8104] DEAD_PROCESS: 8104 ttys001
1/24/11 6:03:55 PM com.apple.launchd.peruser.501[609] ([0x0-0x60060].com.apple.Console[7861]) Exited: Killed
1/24/11 6:03:55 PM com.apple.launchd.peruser.501[609] ([0x0-0x78078].com.apple.Terminal[8055]) Exited: Killed
1/24/11 6:03:55 PM login[8057] DEAD_PROCESS: 8057 ttys000
1/24/11 6:03:55 PM com.apple.launchd.peruser.501[609] (com.apple.AirPortBaseStationAgent[646]) Exited: Killed
1/24/11 6:03:55 PM loginwindow[47] DEAD_PROCESS: 47 console
1/24/11 6:03:55 PM com.apple.UserEventAgent-Aqua[639] Mon Jan 24 18:03:55 Alan-Brons-MacBook-Pro.local UserEventAgent[639] <Warning>: CGSShutdownServerConnections: Detaching application from window server
1/24/11 6:03:55 PM com.apple.UserEventAgent-Aqua[639] Mon Jan 24 18:03:55 Alan-Brons-MacBook-Pro.local UserEventAgent[639] <Warning>: CGSDisplayServerShutdown: Detaching display subsystem from window server
1/24/11 6:03:55 PM UserEventAgent[639] CGSShutdownServerConnections: Detaching application from window server
1/24/11 6:03:55 PM loginwindow[47] CGSShutdownServerConnections: Detaching application from window server
1/24/11 6:03:55 PM loginwindow[47] CGSDisplayServerShutdown: Detaching display subsystem from window server
1/24/11 6:03:55 PM UserEventAgent[639] CGSDisplayServerShutdown: Detaching display subsystem from window server
1/24/11 6:03:55 PM UserEventAgent[639] XRHotKeyAgent:491 kCGErrorInvalidConnection
1/24/11 6:03:55 PM com.apple.loginwindow[47] Mon Jan 24 18:03:55 Alan-Brons-MacBook-Pro.local loginwindow[47] <Warning>: CGSShutdownServerConnections: Detaching application from window server
1/24/11 6:03:55 PM com.apple.loginwindow[47] Mon Jan 24 18:03:55 Alan-Brons-MacBook-Pro.local loginwindow[47] <Warning>: CGSDisplayServerShutdown: Detaching display subsystem from window server
1/24/11 6:03:56 PM /System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow[8173] Login Window Application Started
1/24/11 6:03:56 PM prl_naptd[647] Exiting Parallels Network Daemon
1/24/11 6:03:57 PM com.apple.SecurityServer[24] Session 0x311d08 dead
1/24/11 6:03:57 PM com.apple.SecurityServer[24] Killing auth hosts
1/24/11 6:03:57 PM com.apple.SecurityServer[24] Session 0x311d08 destroyed
1/24/11 6:03:58 PM com.apple.SecurityServer[24] Session 0x235c78 created
1/24/11 6:03:58 PM com.apple.SecurityServer[24] Session 0x235c78 attributes 0x30
1/24/11 6:03:58 PM loginwindow[8173] Login Window Started Security Agent
1/24/11 6:03:59 PM WindowServer[8177] kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
1/24/11 6:03:59 PM com.apple.WindowServer[8177] Mon Jan 24 18:03:59 Alan-Brons-MacBook-Pro.local WindowServer[8177] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
1/24/11 6:03:59 PM com.apple.backupd-attach[8200] Not starting scheduled Time Machine backup - computer is on battery power.
1/24/11 6:04:00 PM SecurityAgent[8186] Showing Login Window
1/24/11 6:04:06 PM hdiejectd[1045] quitCheck: calling exit(0)
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.364 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_amavisd" with home "/var/virusmails" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_amavisd" with home "/var/virusmails" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 83
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.367 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 83
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_appowner'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.368 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_appowner'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_appserver'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.368 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_appserver'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_ard'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.369 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_ard'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_atsserver'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.369 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_atsserver'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_calendar'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.370 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_calendar'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_carddav'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.370 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_carddav'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_clamav" with home "/var/virusmails" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.371 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_clamav" with home "/var/virusmails" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 82
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.371 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 82
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_coreaudiod'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.371 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_coreaudiod'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_cvmsroot'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.372 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_cvmsroot'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_cvs'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.372 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_cvs'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_cyrus" with home "/var/imap" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.373 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_cyrus" with home "/var/imap" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 77
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.373 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 77
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_devdocs'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.374 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_devdocs'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_dovecot'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.374 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_dovecot'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_dpaudio'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.375 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_dpaudio'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_eppc'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.375 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_eppc'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_installer'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.375 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_installer'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_jabber'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.376 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_jabber'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_lda'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.376 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_lda'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_locationd'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.377 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_locationd'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_lp" with home "/var/spool/cups" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.378 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_lp" with home "/var/spool/cups" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 26
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.379 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 26
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_mailman'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.379 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_mailman'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_mcxalr'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.380 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_mcxalr'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_mdnsresponder'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.381 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_mdnsresponder'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_mysql'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.381 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_mysql'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_pcastagent" with home "/var/pcast/agent" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.382 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_pcastagent" with home "/var/pcast/agent" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 55
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.382 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 55
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_pcastserver" with home "/var/pcast/server" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.382 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_pcastserver" with home "/var/pcast/server" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 56
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.383 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 56
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_postfix" with home "/var/spool/postfix" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.383 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_postfix" with home "/var/spool/postfix" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 27
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.384 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 27
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_qtss'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.384 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_qtss'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_sandbox'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.385 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_sandbox'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_screensaver'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.385 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_screensaver'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_securityagent'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.385 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_securityagent'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_serialnumberd'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.386 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_serialnumberd'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_softwareupdate'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.386 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_softwareupdate'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_spotlight'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.387 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_spotlight'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_sshd'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.387 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_sshd'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_svn'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.388 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_svn'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_teamsserver" with home "/var/teamsserver" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.388 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_teamsserver" with home "/var/teamsserver" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 94
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.389 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 94
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_timezone'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.389 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_timezone'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_tokend'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.389 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_tokend'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_trustevaluationagent'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.390 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_trustevaluationagent'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_unknown'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.390 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_unknown'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account ' updatesharing'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.391 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account ' updatesharing'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_usbmuxd" with home "/var/db/lockdown" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.391 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_usbmuxd" with home "/var/db/lockdown" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 213
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.392 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 213
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_uucp" with home "/var/spool/uucp" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 4
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account '_windowserver'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_www" with home "/Library/WebServer" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 70
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_xgridagent" with home "/var/xgrid/agent" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 86
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "_xgridcontroller" with home "/var/xgrid/controller" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 85
1/24/11 6:04:14 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "alan" with home "/Users/alan" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.392 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_uucp" with home "/var/spool/uucp" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.392 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 4
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.393 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account '_windowserver'. localUserMCXRecords count = 54
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.394 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_www" with home "/Library/WebServer" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.394 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 70
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.395 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_xgridagent" with home "/var/xgrid/agent" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.395 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 86
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.396 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "_xgridcontroller" with home "/var/xgrid/controller" from DSLocal because disk disappeared.
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.397 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 85
1/24/11 6:04:14 PM com.apple.loginwindow[8173] 2011-01-24 18:04:14.397 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "alan" with home "/Users/alan" from DSLocal because disk disappeared.
1/24/11 6:04:16 PM ManagedClient[8181] -xaDiskDisappeared: removing external account "daemon" with home "/var/root" from DSLocal because disk disappeared.
1/24/11 6:04:16 PM ManagedClient[8181] MCXCDeleteAccount(): Trying to delete user id = 1
1/24/11 6:04:16 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account 'nobody'. localUserMCXRecords count = 54
1/24/11 6:04:16 PM ManagedClient[8181] -xaDiskDisappeared error attempting to delete empty home account 'zend'. localUserMCXRecords count = 54
1/24/11 6:04:16 PM com.apple.loginwindow[8173] 2011-01-24 18:04:16.666 ManagedClient[8181:903] -xaDiskDisappeared: removing external account "daemon" with home "/var/root" from DSLocal because disk disappeared.
1/24/11 6:04:16 PM com.apple.loginwindow[8173] 2011-01-24 18:04:16.667 ManagedClient[8181:903] MCXCDeleteAccount(): Trying to delete user id = 1
1/24/11 6:04:16 PM com.apple.loginwindow[8173] 2011-01-24 18:04:16.667 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account 'nobody'. localUserMCXRecords count = 54
1/24/11 6:04:16 PM com.apple.loginwindow[8173] 2011-01-24 18:04:16.667 ManagedClient[8181:903] -xaDiskDisappeared error attempting to delete empty home account 'zend'. localUserMCXRecords count = 54
1/24/11 6:04:18 PM loginwindow[8173] Login Window - Returned from Security Agent
1/24/11 6:04:19 PM kernel systemShutdown true
1/24/11 6:04:19 PM shutdown[8222] halt by alan:
1/24/11 6:04:19 PM shutdown[8222] SHUTDOWN_TIME: 1295852659 286784
1/24/11 6:04:19 PM SystemStarter[41] "/Library/StartupItems" failed sanity check: path was created after boot up
1/24/11 6:04:19 PM Parallels[8224] Stopping Parallels Dispatcher Service
1/24/11 6:04:19 PM Parallels[8230] Stopping Parallels networking
1/24/11 6:04:19 PM prl_naptd[273] Exiting Parallels Network Daemon
1/24/11 6:04:19 PM Parallels[8249] Unloading kernel extension prl_netbridge.kext
1/24/11 6:04:20 PM kernel Kext loading now disabled.
1/24/11 6:04:20 PM kernel Kext unloading now disabled.
1/24/11 6:04:20 PM kernel Kext autounloading now disabled.
1/24/11 6:04:20 PM kernel Kernel requests now disabled.
1/24/11 6:04:20 PM kernel com.parallels.kext.prlnet 6.0.11828.615184 is unloading.
1/24/11 6:04:20 PM kernel free vms_list while it is not empty
1/24/11 6:04:20 PM kernel Kext unloading is disabled (com.parallels.kext.prl_netbridge).
1/24/11 6:04:20 PM Parallels[8272] Failed to unload kernel extension prl_netbridge.kext
1/24/11 6:04:20 PM Parallels[8277] Unloading kernel extension prl_vnic.kext
1/24/11 6:04:20 PM kernel Kext unloading is disabled (com.parallels.kext.prl_netbridge).
1/24/11 6:04:20 PM kernel Kext unloading is disabled (com.parallels.kext.prl_netbridge).
1/24/11 6:04:20 PM kernel com.parallels.kext.vnic 6.0.11828.615184 is unloading.
1/24/11 6:04:20 PM kernel Failed to delete address of interface: 102
1/24/11 6:04:20 PM kernel Failed to delete address of interface: 102
1/24/11 6:04:20 PM kernel com parallels_kext_prl_vnicbus: wait for detach for 0
1/24/11 6:04:20 PM kernel com parallels_kext_prl_vnic_bus::detachhandler for 0
1/24/11 6:04:20 PM kernel com parallels_kext_prl_vnicbus: detached 0
1/24/11 6:04:20 PM kernel com parallels_kext_prlvnic: destroyed vnic0
1/24/11 6:04:20 PM kernel Failed to delete address of interface: 102
1/24/11 6:04:20 PM kernel Failed to delete address of interface: 102
1/24/11 6:04:20 PM kernel com parallels_kext_prl_vnicbus: wait for detach for 1
1/24/11 6:04:20 PM kernel com parallels_kext_prl_vnic_bus::detachhandler for 1
1/24/11 6:04:20 PM kernel com parallels_kext_prl_vnicbus: detached 1
1/24/11 6:04:20 PM kernel com parallels_kext_prlvnic: destroyed vnic1
1/24/11 6:04:20 PM kernel Kext unloading is disabled (com.parallels.kext.prl_vnic).
1/24/11 6:04:20 PM Parallels[8300] Failed to unload kernel extension prl_vnic.kext
1/24/11 6:04:20 PM Parallels[8303] Parallels Networking was stopped
1/24/11 6:04:20 PM DirectoryService[11] BUG in libdispatch: 10J567 - 1960 - 0x10004004
1/24/11 6:04:20 PM WindowServer[8177] hidd died. Reestablishing connection.
1/24/11 6:04:20 PM SecurityAgent[8186] CGSShutdownServerConnections: Detaching application from window server
1/24/11 6:04:20 PM WindowServer[8177] bootstrap lookip failed: Unknown service name
1/24/11 6:04:20 PM mDNSResponder[18] mDNSResponder mDNSResponder-258.14 (Nov 18 2010 14:18:32) stopping
1/24/11 6:04:21 PM SecurityAgent[8186] MIG: server died: CGSReleaseShmem : Cannot release shared memory
1/24/11 6:04:21 PM SecurityAgent[8186] kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
1/24/11 6:04:21 PM SecurityAgent[8186] CGSDisplayServerShutdown: Detaching display subsystem from window server
1/24/11 6:04:21 PM SecurityAgent[8186] HIToolbox: received notification of WindowServer event port death.
1/24/11 6:04:21 PM SecurityAgent[8186] port matched the WindowServer port created in BindCGSToRunLoop
1/24/11 6:04:21 PM SecurityAgent[8186] kCGErrorRangeCheck: On-demand launch of the Window Server is allowed for root user only.
1/24/11 6:04:21 PM kernel Kext unloading is disabled (com.parallels.kext.prl_vnic).
1/24/11 6:04:21 PM kernel Kext unloading is disabled (com.parallels.kext.prl_vnic).
1/24/11 6:04:21 PM com.apple.SecurityServer[24] Session 0x235c78 dead

MacBook Pro, Mac OS X (10.6.6)

Posted on Jan 24, 2011 3:08 PM

Reply
Question marked as Best reply

Posted on Jan 24, 2011 6:31 PM

Welcome to Apple Discussions.

This is a real puzzle - there have been a number of related reports recently:

http://discussions.apple.com/thread.jspa?threadID=2675891
http://discussions.apple.com/thread.jspa?threadID=2684412
http://discussions.apple.com/message.jspa?messageID=12731083

Your log includes:
1/24/11 6:04:14 PM ManagedClient818 -xaDiskDisappeared: removing
external account "alan" with home "/Users/alan" from DSLocal because disk
disappeared.


Is "alan" your regular user account? If so, is it supposed to be local to your HD? (the log report calls it "external account 'alan'")

There have been suggestions in the other threads that the trigger for the inappropriate account destruction by the system might involve the unexpected disconnection of an external USB drive. The situation isn't at all clear, though.
5 replies
Question marked as Best reply

Jan 24, 2011 6:31 PM in response to Shane MacPhillamy

Welcome to Apple Discussions.

This is a real puzzle - there have been a number of related reports recently:

http://discussions.apple.com/thread.jspa?threadID=2675891
http://discussions.apple.com/thread.jspa?threadID=2684412
http://discussions.apple.com/message.jspa?messageID=12731083

Your log includes:
1/24/11 6:04:14 PM ManagedClient818 -xaDiskDisappeared: removing
external account "alan" with home "/Users/alan" from DSLocal because disk
disappeared.


Is "alan" your regular user account? If so, is it supposed to be local to your HD? (the log report calls it "external account 'alan'")

There have been suggestions in the other threads that the trigger for the inappropriate account destruction by the system might involve the unexpected disconnection of an external USB drive. The situation isn't at all clear, though.

Jan 24, 2011 6:58 PM in response to jsd2

Alan is the regular user. A couple of other observations that may be relevant to the behaviour:

1. The MacBook was purchased through an authorised reseller, with a larger disk (750GB) installed by the dealer, not by Apple at the point of manufacture. I installed the OS after taking delivery of the upgraded system.

2. /User/alan exists on this 750GB disk

3. Circumstantial observation points to the issue being triggered by backupd about to run, shutdown being initiated and power being removed.

Jan 24, 2011 8:07 PM in response to Shane MacPhillamy

That drive hardware sounds OK.

I would routinely check both that disk and your HD in Disk Utility if you haven't already done so.

I guess for diagnostic purposes you could for the next week or so try turning off Time Machine manually and perhaps also ejecting the drive before shutting down, and turning it back on when you restart, just to see if the problem still recurs. Even if that works, though, it's not something you'd want to keep doing without a more definitive solution.

You could also empirically just try re-installing OS X.

Hopefully others here can give you additional suggestions.

Message was edited by: jsd2

Admin User account deleted by MCXCDeleteAccount at shutdown

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