Freezes to Grey or Blue Screen of Death, iMac 2.8 GHZ 10.6.3

[spitboy2000]

Everything seemed to be going well with my beautiful iMac 2.8ghz 24. But now, about once a day, it freezes and the screen will shift suddenly to a blue or grey screen of death.

How do I go about working this problem?

----

got these console messages

5/14/10 9:52:20 PM [0x0-0x29029].com.apple.Safari[326] Debugger() was called!
5/14/10 9:52:38 PM mDNSResponder[18] sendChallengeResponse: 3 failed attempts for LLQ _adisk._tcp.theadmiraladama.members.mac.com.
5/14/10 9:52:38 PM mDNSResponder[18] sendChallengeResponse: 3 failed attempts for LLQ _rfb._tcp.theadmiraladama.members.mac.com.
5/14/10 9:52:44 PM mDNSResponder[18] sendChallengeResponse: 3 failed attempts for LLQ _afpovertcp._tcp.theadmiraladama.members.mac.com.
5/14/10 9:53:13 PM mDNSResponder[18] _autotunnel._udp.Admiral-Adamas-iMac.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:13 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record _autotunnel._udp.Admiral-Adamas-iMac.theadmiraladama.members.mac.com. type 33 failed with error -65560
5/14/10 9:53:14 PM mDNSResponder[18] Admiral\032Adama’s\032iMac\0322-B72F8FE2-C903-4670-B556-AC86C6C2756E._qmp4._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:14 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac\0322-B72F8FE2-C903-4670-B556-AC86C6C2756E._qmp4._tcp.theadmiraladama.members.mac.com.
5/14/10 9:53:15 PM mDNSResponder[18] Admiral\032Adama’s\032iMac-E0BB7858-B798-44A7-B6E7-3A44FABA1D8A._qmp4._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:15 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac-E0BB7858-B798-44A7-B6E7-3A44FABA1D8A._qmp4._tcp.theadmiraladama.members.mac.com.
5/14/10 9:53:16 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._device-info._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:16 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record Admiral\032Adama’s\032iMac._device-info._tcp.theadmiraladama.members.mac.com. type 16 failed with error -65560
5/14/10 9:53:19 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._airvideoserver._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:19 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac._airvideoserver._tcp.theadmiraladama.members.mac.com.
5/14/10 9:53:19 PM mDNSResponder[18] Admiral\032Adama’s\032iMac-7422D474-FD7D-4C68-9879-B83ECF807C52._qmp4._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:19 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac-7422D474-FD7D-4C68-9879-B83ECF807C52._qmp4._tcp.theadmiraladama.members.mac.com.
5/14/10 9:53:19 PM mDNSResponder[18] _kerberos.Admiral-Adamas-iMac.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:19 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record _kerberos.Admiral-Adamas-iMac.theadmiraladama.members.mac.com. type 16 failed with error -65560
5/14/10 9:53:20 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._rfb._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:20 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac._rfb._tcp.theadmiraladama.members.mac.com.
5/14/10 9:53:20 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._afpovertcp._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:20 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac._afpovertcp._tcp.theadmiraladama.members.mac.com.
5/14/10 9:53:21 PM mDNSResponder[18] Admiral-Adamas-iMac.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:21 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record Admiral-Adamas-iMac.theadmiraladama.members.mac.com. type 28 failed with error -65560
5/14/10 9:53:21 PM mDNSResponder[18] AutoTunnel-02-1F-F3-FF-FE-D7-F6-26.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:53:21 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record AutoTunnel-02-1F-F3-FF-FE-D7-F6-26.theadmiraladama.members.mac.com. type 1 failed with error -65560
5/14/10 9:55:25 PM mDNSResponder[18] Admiral\032Adama’s\032iMac-E0BB7858-B798-44A7-B6E7-3A44FABA1D8A._qmp4._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:25 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac-E0BB7858-B798-44A7-B6E7-3A44FABA1D8A._qmp4._tcp.theadmiraladama.members.mac.com.
5/14/10 9:55:26 PM mDNSResponder[18] Admiral\032Adama’s\032iMac\0322-B72F8FE2-C903-4670-B556-AC86C6C2756E._qmp4._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:26 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac\0322-B72F8FE2-C903-4670-B556-AC86C6C2756E._qmp4._tcp.theadmiraladama.members.mac.com.
5/14/10 9:55:27 PM mDNSResponder[18] _autotunnel._udp.Admiral-Adamas-iMac.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:27 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record _autotunnel._udp.Admiral-Adamas-iMac.theadmiraladama.members.mac.com. type 33 failed with error -65560
5/14/10 9:55:30 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._device-info._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:30 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record Admiral\032Adama’s\032iMac._device-info._tcp.theadmiraladama.members.mac.com. type 16 failed with error -65560
5/14/10 9:55:35 PM mDNSResponder[18] _kerberos.Admiral-Adamas-iMac.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:35 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record _kerberos.Admiral-Adamas-iMac.theadmiraladama.members.mac.com. type 16 failed with error -65560
5/14/10 9:55:37 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._afpovertcp._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:37 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac._afpovertcp._tcp.theadmiraladama.members.mac.com.
5/14/10 9:55:41 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._airvideoserver._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:41 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac._airvideoserver._tcp.theadmiraladama.members.mac.com.
5/14/10 9:55:45 PM mDNSResponder[18] Admiral-Adamas-iMac.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:45 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record Admiral-Adamas-iMac.theadmiraladama.members.mac.com. type 28 failed with error -65560
5/14/10 9:55:47 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._rfb._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:47 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac._rfb._tcp.theadmiraladama.members.mac.com.
5/14/10 9:55:47 PM mDNSResponder[18] Admiral\032Adama’s\032iMac-7422D474-FD7D-4C68-9879-B83ECF807C52._qmp4._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:47 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac-7422D474-FD7D-4C68-9879-B83ECF807C52._qmp4._tcp.theadmiraladama.members.mac.com.
5/14/10 9:55:48 PM mDNSResponder[18] AutoTunnel-02-1F-F3-FF-FE-D7-F6-26.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:55:48 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record AutoTunnel-02-1F-F3-FF-FE-D7-F6-26.theadmiraladama.members.mac.com. type 1 failed with error -65560
5/14/10 9:55:57 PM Skype[205] SkypeEventNotificator:laySound: ERROR: cannot load sound Busy
5/14/10 9:59:54 PM mDNSResponder[18] Admiral\032Adama’s\032iMac-E0BB7858-B798-44A7-B6E7-3A44FABA1D8A._qmp4._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:59:54 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac-E0BB7858-B798-44A7-B6E7-3A44FABA1D8A._qmp4._tcp.theadmiraladama.members.mac.com.
5/14/10 9:59:55 PM mDNSResponder[18] Admiral\032Adama’s\032iMac\0322-B72F8FE2-C903-4670-B556-AC86C6C2756E._qmp4._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 9:59:55 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac\0322-B72F8FE2-C903-4670-B556-AC86C6C2756E._qmp4._tcp.theadmiraladama.members.mac.com.
5/14/10 10:00:06 PM mDNSResponder[18] _autotunnel._udp.Admiral-Adamas-iMac.theadmiraladama.members.mac.com.: bad signature
5/14/10 10:00:06 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record _autotunnel._udp.Admiral-Adamas-iMac.theadmiraladama.members.mac.com. type 33 failed with error -65560
5/14/10 10:00:11 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._device-info._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 10:00:11 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record Admiral\032Adama’s\032iMac._device-info._tcp.theadmiraladama.members.mac.com. type 16 failed with error -65560
5/14/10 10:00:21 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._afpovertcp._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 10:00:21 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac._afpovertcp._tcp.theadmiraladama.members.mac.com.
5/14/10 10:00:33 PM mDNSResponder[18] _kerberos.Admiral-Adamas-iMac.theadmiraladama.members.mac.com.: bad signature
5/14/10 10:00:33 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record _kerberos.Admiral-Adamas-iMac.theadmiraladama.members.mac.com. type 16 failed with error -65560
5/14/10 10:00:45 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._airvideoserver._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 10:00:45 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac._airvideoserver._tcp.theadmiraladama.members.mac.com.
5/14/10 10:00:54 PM mDNSResponder[18] Admiral-Adamas-iMac.theadmiraladama.members.mac.com.: bad signature
5/14/10 10:00:54 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record Admiral-Adamas-iMac.theadmiraladama.members.mac.com. type 28 failed with error -65560
5/14/10 10:00:56 PM mDNSResponder[18] Admiral\032Adama’s\032iMac-7422D474-FD7D-4C68-9879-B83ECF807C52._qmp4._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 10:00:56 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac-7422D474-FD7D-4C68-9879-B83ECF807C52._qmp4._tcp.theadmiraladama.members.mac.com.
5/14/10 10:00:57 PM mDNSResponder[18] Admiral\032Adama’s\032iMac._rfb._tcp.theadmiraladama.members.mac.com.: bad signature
5/14/10 10:00:57 PM mDNSResponder[18] Error -65560 for registration of service Admiral\032Adama’s\032iMac._rfb._tcp.theadmiraladama.members.mac.com.
5/14/10 10:00:59 PM mDNSResponder[18] AutoTunnel-02-1F-F3-FF-FE-D7-F6-26.theadmiraladama.members.mac.com.: bad signature
5/14/10 10:00:59 PM mDNSResponder[18] hndlRecordUpdateReply: Registration of record AutoTunnel-02-1F-F3-FF-FE-D7-F6-26.theadmiraladama.members.mac.com. type 1 failed with error -65560

 

[Vikz]

Is there any message that appears with the gray or blue screen or even qfter rebooting?

 

[spitboy2000]

no message after rebooting

 

[marcr1230]

mDNS and Bonjour

the messages you see are Bonjour related
some googling suggests turning of Bonjour via the command:

launchctl unload -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

The "-w" is to write the change so that Bonjour services stay down after a reboot, leav out this parameter and Bonjour will come back automatically on reboot

the other posting also say Bonjour is needed and you will see some apps beachball (like printing) - so you probably don't want to leave it down forever

finally - not clear at all that these messages are related to the crashing

there are various logs available in /var/log and /Library/Logs/CrashReporter that can be accessed via the console - these can tell you what was happening before the crash


Big Brother

 

[lkirkup]

I have a 2.8Ghz 24" iMac as well. It started doing the same thing.
Turns out it was the HDD failing.
If I was you I would make sure you have a backup of everything.

Run the Apple Hardware Test.
See details here http://support.apple.com/kb/ht1509
Make sure you do the extended testing. It will take about an hour, but it will tell you if the HDD is failing.