IMac with Tiger not booting

Question

Had some apple software update was in the middle of some other activity, so did not notice and accepted it.
At the end of the update, had a "unexpected error", and was prompted to restart. I did, and have not been able to restart, get stuck with the spinning wheel.
Actions taken
- Reset PROM
- Started in Safe mode / with Verbose - its stuck with "IOBluetoothHCIController::start idle Timer Stopped"
- Started with install CD/ ran utitities / was a minor error whcih got rectified but restart did not help
- Did SMC reset - did not work
- Removed ethernet cable, all other peripherals except mouse/keyboard -> started with safe/verbose mode - stuck at same place.
Any help?! next steps. Have my tax work 80% done on my mac and need to get back in asap.

Answer 1

Hi nandur,
I'm not sure what update you were doing so here's a bunch of suggestions. The first set are to try routine repairs and troubleshooting. The second set (with reference to security updates) involve reinstalling updates and/or the operating system.
In future I'd go with the recommendations in my "updating" section and not let Software Update do it. Just let it tell you what needs updating, then do it yourself.
Boot from the installer disk, select language if applicable, choose utilities, run Disk Utility and verify (and repair if necessary) the drive. You can verify a drive from DU on your main drive while booted but I have found this can result in incorrect reporting of errors. To repair your drive you have to run it from a drive other than the boot drive anyway.
Next, boot from your drive in [Safe Mode|http://docs.info.apple.com/article.html?artnum=107393] and repair permissions. You can repair permissions while booted from the installer disc but this uses the permissions configuration on the installer disc which may be out of date if you have run any updates on your computer. Booting your computer to Safe Mode restricts the number of things running on your computer while permissions are being run and does a bit of spring cleaning at the same time.
[Resolve startup issues and perform disk maintenance with Disk Utility and fsck|http://docs.info.apple.com/article.html?artnum=106214]
[Using Disk Utility in Mac OS X 10.4.3 or later|http://docs.info.apple.com/article.html?artnum=302672]
[Disk Utility's Repair Disk Permissions|http://docs.info.apple.com/article.html?artnum=25751]
From BDaqua (couldn't have said it better):
"Try Disk Utility
1. Insert the Mac OS X Install disc that came with your computer (Edit: Do not use this disc if it is not the same general version as what you have currently on your computer, e.g. use a Tiger disc for a Tiger drive, not a Panther disc), then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
6. Click Repair. Disk Utility checks and repairs the disk.
Then Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes."
Two things seemed to be solutions for Security Update 2008-008 problems from what I have read, and may also work with 2009-01.
One is Archive and Install which will replace the corrupted system but then requires you reapply all your updates. Select the keep settings and preferences when doing A&I. Make sure you select that option when doing A&I if you want settings and preferences kept. Some third party applications may need reinstalling if they have special components.
[Mac OS X: About the Archive and Install feature|http://support.apple.com/kb/HT1710?viewlocale=en_US]
[X-Lab Archive and install|http://www.thexlab.com/faqs/archiveinstall.html]
[Kappy's A&I instructions|http://discussions.apple.com/thread.jspa?threadID=1823034&tstart=0 ]
[How to get files from a previous home directory after Archive and Install|http://docs.info.apple.com/article.html?artnum=107297]
The other is to try to re-install the security update on the main drive while booted from a secondary drive or in Single User Mode. This could be from another Mac computer while your first one is in Target Disk Mode, perhaps a bootable backup drive, or possibly from your installer disc. Here's references for those methods:
http://discussions.apple.com/message.jspa?messageID=8728797#8728797
http://discussions.apple.com/message.jspa?messageID=8733921#8733921
http://discussions.apple.com/thread.jspa?messageID=8634535#8634535
A version of this is to use Single User Mode and Terminal to re-install the update as in:
http://discussions.apple.com/message.jspa?messageID=8991074#8991074
Updating
Certain steps appear to minimize the risk of an update producing problems.
Number one is to make sure you have a clone backup of your computer in case you do need to back out of it again. This is the only guaranteed way of not having to worry about the results of an update.
Some like to boot from their installer discs or an external backup and verify (and if necessary repair) their internal drives as well as drive permissions. This is done with Disk Utility. You can verify a drive while booted from the same drive but sometimes this produces spurious errors. Repairing a drive (if necessary) has to be done while booted from another disk. Permissions repair can, and is probably best, done when booted from your internal drive.
[Resolve startup issues and perform disk maintenance with Disk Utility and fsck|http://docs.info.apple.com/article.html?artnum=106214]
[Using Disk Utility in Mac OS X 10.4.3 or later|http://docs.info.apple.com/article.html?artnum=302672]
[Disk Utility's Repair Disk Permissions|http://docs.info.apple.com/article.html?artnum=25751]
You can also go to the step of booting into safe mode to do the install.
[Mac OS X: Starting up in Safe Mode|http://docs.info.apple.com/article.html?artnum=107393]
[What is Safe Boot, Safe Mode? (Mac OS X)|http://docs.info.apple.com/article.html?artnum=107392]
[Safe Boot takes longer than normal startup|http://docs.info.apple.com/article.html?artnum=107394]
I like to download the update onto my computer and install it from there rather than let Software Update do it. I know a few people who had problems with doing the update via software updater found a manual install to work.
Repair permissions again afterward.
It also helps to only install one update at a time and to run the computer for a while to make sure it is behaving well.
The more cautious even like to unplug third party peripherals (see [comment by BDaqua|http://discussions.apple.com/message.jspa?messageID=9040746#9040746]).
Almost all of the above steps (except backup) have been questioned as to necessity because probably many people have done successful updates without doing them. I say they can't hurt, they can very likely do good (especially if your computer isn't regularly maintained), so why not do them to be safe.
[BDaqua's comments on updating problems|http://discussions.apple.com/message.jspa?messageID=8948595#8948595]
[Baby Boomer's comments on updating problems|http://discussions.apple.com/message.jspa?messageID=9025760#9025760]