Imac freeze when I update to 10.6.8

HI,
It seems that prior updates worked. However, when I update to 10.6.8 my system will freeze. The only that that moves is my cursor.
I can be on the web, scrolling. It will happem when new email is being down loaded. I can be working on th PC side and will experence it.
I ran the "Disk" repair. But even after the run is done the system will work for a short while and the freeze.
Now I can reinstall 10.5 "Snow Lepoard" and not update to the latest "Package" update and all works well.
So the main question is "What gives?". Its very troublesome. Is there any soulition to this?

How much RAM is installed? How much free space on your hard drive?
How to Install Snow Leopard Successfully
A. Repair the Hard Drive and Permissions:
Boot from your current OS X Installer disc. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
B. Make a Bootable Backup Using Restore Option of Disk Utility:
Open Disk Utility from the Utilities folder.
Select the destination volume from the left side list.
Click on the Restore tab in the DU main window.
Check the box labeled Erase destination.
Select the destination volume from the left side list and drag it to the Destination entry field.
Select the source volume from the left side list and drag it to the Source entry field.
Double-check you got it right, then click on the Restore button.
Destination means the external backup drive. Source means the internal startup drive.
C. Important: Please read before installing:
If you have a FireWire hard drive connected, disconnect it before installing the update unless you will boot from this drive and install the update on it. Reconnect it and turn it back on after installation is complete and you've restarted.
You may experience unexpected results if you have installed third-party system software modifications, or if you have modified the operating system through other means. (This does not apply to normal application software installation.)
The installation process should not be interrupted. If a power outage or other interruption occurs during installation, use the standalone installer (see below) from Apple Downloads to update. While the installation is in progress do not use the computer.
D. To upgrade:
Purchase the Snow Leopard Retail DVD.
Boot From The OS X Installer Disc:
Insert OS X Installer Disc into the optical drive.
Restart the computer.
Immediately after the chime press and hold down the "C" key.
Release the key when the spinning gear below the dark gray Apple logo appears.
Wait for installer to finish loading.
E. If updating:
Download and install update(s)
Use Software Update, or
Download standalone updater(s).

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I originally posted this in the "Using Mac OS X" forum (iMac freezes when changing the screen saver, but thought I'd post here as well since the issue arises on a freshly installed OS.
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I'm going to mark this one as answered.
I removed the hard drive from the iMac, and put it into another 350 MHz iMac, and everything works great. I can select any screen saver without having it freeze, create new accounts, whatever my little heart desires.
In checking the history of the problem iMac, there was an assortment of problems with booting (both from the hard drive and from the CD-ROM drive) which were never satisfactorily resolved. The problems just seemed to go away after sitting unplugged for a few days, as much as for anything we actually did to it.
Now we just have to decide whether it's worth fixing, or using it somewhere in a non-critical role with OS 9 installed.
Cheers,
Andrew

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TutorDaddy, if this Mac is still covered by the initial warranty or under AppleCare, take it in and have it looked at. As the old label used to say, there truly are "no user serviceable parts inside." Kernel panics very usually indicate failing hardware.
I have an older iBook G4 that started developing kernel panics and like you, despite reinstalling the OS from a freshly formatted volume, they kept continuing. I looked at the crash log and saw that in each instance of panic, the last bit of code to be accessed had something to do with AirPort. Knowing that the AirPort software was at then current levels, I surmised the problem to be a bad AirPort networking card which, on that particular model of the iBook, was a very small module attached directly to the logic board. Since the computer was out of AppleCare, I broke the machine down myself (I didn't realize that there could be so many barely visible screws in one machine) and removed the offending piece of hardware. My iBook lives but without WiFi, it now sits as a more or less desktop machine needing an ethernet connection to stay connected to a network.
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[edited to add:]
After browsing through related problems in the discussions, I saw this link to a third-party web site being handed out. Perhaps you'll find it useful: http://www.thexlab.com/faqs/kernelpanics.html
Message was edited by: Stephen Adams

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Bootup holding CMD+r, or the Option/alt key to boot from the Restore partition & use Disk Utility from there to Repair the Disk, then Repair Permissions.

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I'm having a similar problem. I shut down my iMac at the end of the day (we have a lot of power outages here). The last few days, after I choose "Shut down," it won't -- the screen displays the screen saver (desktopia) but no dock or menu bar. Sometimes the cursor is a spinning wheel, but more often it's an arrow.
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6/15/08 5:00:00 PM [0x0-0xe00e].com.toastycode.CuckooChimeAgent[121] CuckooChimeAgent(121,0xa0259fa0) malloc: * error for object 0x1536b0: double free
6/15/08 5:00:00 PM [0x0-0xe00e].com.toastycode.CuckooChimeAgent[121] * set a breakpoint in mallocerrorbreak to debug
6/15/08 7:29:19 PM desktopia[122] firing 00-00.jpg in 34240.018068 seconds
6/15/08 7:29:19 PM desktopia[122] firing 04-00.jpg in 37840.008991 seconds
6/15/08 7:29:19 PM desktopia[122] firing 07-00.jpg in 40540.005288 seconds
6/15/08 7:29:19 PM desktopia[122] firing 09-00.jpg in 45040.003027 seconds
6/15/08 7:29:19 PM desktopia[122] firing 12-00.jpg in 48640.000343 seconds
6/15/08 7:29:20 PM desktopia[122] firing 16-00.jpg in 77439.998329 seconds
6/15/08 7:29:20 PM desktopia[122] firing 20-00.jpg in 81039.996202 seconds
6/15/08 7:29:20 PM desktopia[122] firing 22-00.jpg in 84639.861420 seconds
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6/15/08 8:07:52 PM com.apple.launchd[1] (org.cups.cupsd) Unknown key: SHAuthorizationRight
6/15/08 8:07:52 PM com.apple.launchd[1] (org.ntp.ntpd) Unknown key: SHAuthorizationRight
6/15/08 8:08:10 PM com.apple.launchd[1] (com.apple.UserEventAgent-LoginWindow[80]) Exited: Terminated
6/15/08 8:08:10 PM com.apple.launchctl.Aqua[88] launchctl: Please convert the following to launchd: /etc/machinit_peruser.d/RemoteUI.plist
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6/15/08 8:08:13 PM desktopia[127] firing 04-00.jpg in 35506.415797 seconds
6/15/08 8:08:13 PM desktopia[127] firing 07-00.jpg in 38206.414950 seconds
6/15/08 8:08:13 PM desktopia[127] firing 09-00.jpg in 42706.414463 seconds
6/15/08 8:08:13 PM desktopia[127] firing 12-00.jpg in 46306.413962 seconds
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6/15/08 8:08:13 PM desktopia[127] firing 22-00.jpg in 82306.398947 seconds
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6/16/08 12:47:45 PM com.apple.launchd[1] (org.cups.cupsd) Unknown key: SHAuthorizationRight
6/16/08 12:47:45 PM com.apple.launchd[1] (org.ntp.ntpd) Unknown key: SHAuthorizationRight
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6/16/08 12:48:07 PM com.apple.launchctl.Aqua[91] launchctl: Please convert the following to launchd: /etc/machinit_peruser.d/RemoteUI.plist
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6/16/08 12:48:10 PM desktopia[133] firing 07-00.jpg in 64609.771625 seconds
6/16/08 12:48:10 PM desktopia[133] firing 09-00.jpg in 69109.771061 seconds
6/16/08 12:48:10 PM desktopia[133] firing 12-00.jpg in 72709.765591 seconds
6/16/08 12:48:10 PM desktopia[133] firing 16-00.jpg in 15109.765010 seconds
6/16/08 12:48:10 PM desktopia[133] firing 20-00.jpg in 18709.764175 seconds
6/16/08 12:48:10 PM desktopia[133] firing 22-00.jpg in 22309.763583 seconds
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6/16/08 12:52:48 PM SoftwareUpdateCheck[127] Auto-download of "AirPort Utility" SUCCESSFUL.
6/16/08 12:52:48 PM SoftwareUpdateCheck[127] Downloading "Digital Camera Raw Compatibility Update"
6/16/08 12:52:58 PM SoftwareUpdateCheck[127] Auto-download of "Digital Camera Raw Compatibility Update" SUCCESSFUL.
6/16/08 12:52:58 PM Software Update[160] arguments=(null)
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6/16/08 1:58:19 PM desktopia[133] firing 04-00.jpg in 57700.016479 seconds
6/16/08 1:58:19 PM desktopia[133] firing 07-00.jpg in 60400.011896 seconds
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6/16/08 2:30:17 PM com.apple.launchctl.System[2] fsck_hfs: Use the -f option to force checking.
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6/16/08 2:30:19 PM com.apple.launchd[1] (org.ntp.ntpd) Unknown key: SHAuthorizationRight
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6/16/08 2:32:59 PM com.apple.launchctl.System[2] launchctl: Please convert the following to launchd: /etc/mach_init.d/dashboardadvisoryd.plist
6/16/08 2:32:59 PM com.apple.launchd[1] (org.cups.cupsd) Unknown key: SHAuthorizationRight
6/16/08 2:32:59 PM com.apple.launchd[1] (org.ntp.ntpd) Unknown key: SHAuthorizationRight
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6/16/08 2:33:20 PM com.apple.launchctl.Aqua[89] launchctl: Please convert the following to launchd: /etc/machinit_peruser.d/RemoteUI.plist
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6/16/08 2:33:31 PM desktopia[133] firing 09-00.jpg in 62788.024045 seconds
6/16/08 2:33:31 PM desktopia[133] firing 12-00.jpg in 66388.023558 seconds
6/16/08 2:33:31 PM desktopia[133] firing 16-00.jpg in 8788.023087 seconds
6/16/08 2:33:31 PM desktopia[133] firing 20-00.jpg in 12388.022606 seconds
6/16/08 2:33:31 PM desktopia[133] firing 22-00.jpg in 15988.022127 seconds
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Imac freezing when shutting down

hi, i have this problem for quite a while now. it does not happen all the time but 9 times out of 10 this happens.
when i shut down my imac, the screen goes blue as it should then you get the circle with the black lines going round until it shuts down. thats where it stops, it freezes there and then i have to manually shut it down by pressing the button at the back.
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Had had my 500GB HD replaced by apple in my imac24 today, after reinstalling everything and updating I indeed am experiencing the issue of the power button press to sleep COMPLETY locking and freezing the iMac.
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Has anyone had a resolve yet??

IMac freezes when on the internet

Recently FireFox and Safari did automatic upgrades on my computer. Now whenever I use either browser my computer freezes. Do I need to upgrade some other application, even though the updater indicates all software is up to date?
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