Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Mac OS X Update Fix if Interrupted and Can No Longer Boot

I have noticed that many people are having problems installing the new Mac OS X 10.5.6 update on to their computers. It seems that a common theme is that they have tried installing from the Apple Software Update utility. It has been found that the recommended course of action to take with this update is to download it directly from the Apple site as a .dmg file and then manually install it. But what if your update is interrupted by a power failure, it freezes, or something else goes wrong that causes you to have to restart your computer manually?

In some cases people are able to reboot their computers just fine, but some are unable to boot back into the Mac OS. My problem occurred when my Mac was in the middle of installing the the 10.5.6 update. I stupidly powered down in the middle of the update thinking the bar was frozen. Upon trying to boot up in the Mac OS again the Apple logo and the spinning grey progress ball would appear but then the screen would go dark grey and a message would appear (in four languages) that I needed to restart my computer. I read online that this is called a 'kernel panic.' This cycle would continue indefinitely. (It should be noted at this point that I also had a Windows partition installed. I was able to hold down the 'option' key upon start up and choose to boot into Windows with no problems at all.)

With a failure to boot into the Mac OS I turned first to the Mac OS discs that had been included with my computer. I used all of the tools included in the Disc Utility with no success. I did not want to resort to having to install a fresh copy of the OS. I even tried using the program called 'Disc Warrior' to repair the directory. This can be a very useful program in rescuing drives that have crashed and seem to be no longer accessible. It did not help me in this case. The kernel panic message remained ever time I tried to boot up in the Mac OS.

Then I had an idea. Why not find an external hard drive with Mac OS X installed on it and boot from that? Lacking a dedicated external drive I turned to my trusty 60GB ipod classic. I connected it through USB to my Mac and booted up with the OS discs. From there I formatted the ipod to the proper specifications needed to install Mac OS X. After formatting, it allowed me to install a clean copy of the Mac OS onto the ipod, I was able to hold down the option key and choose to boot from the ipod. Upon successful boot-up I had two choices A)Grab all my files that I needed then reinstall a fresh copy of the Mac OS on my internal drive or B) Try and reapply the Mac OS X 10.5.6 update using the standalone installer I had downloaded from Apple just for this occasion. I chose the latter. To my amazement and joy all I had to do was plug in my flash drive in the other USB part containing the update and choose to install it to my internal drive. It went off without a hitch and after a successful reapplication of the update I restarted and booted from my originally inaccessible Mac OS partition on my internal drive.

I hope this helps someone out there.

- AV

Macbook Pro, Mac OS X (10.5.6)

Posted on Dec 29, 2008 11:50 AM

Reply
4 replies

Dec 29, 2008 11:55 AM in response to awvik360

Welcome to Apple Discussions:
In most cases a "stuck" update can be fixed by booting into the Safe mode - reboot holding down shift key - and at the login screen, click restart and let system reboot normally.
If this does not work, then boot into your Leopard DVD - insert DVD, reboot and hold down "C" key. After language screen, in menu, top left, under Utilities, run disk utility and repair HD and permissions and try again.

Mar 23, 2009 1:57 PM in response to awvik360

This worked amazingly!! Thanks for the post awvik360!

I was able to access the internal hard drive and perform a permissions fix through disk utility and re-apply the OS X 10.5.6 combo update on a totally debilitated machine (Mac Pro early 08).

Some clarification though:

{{ I used a MacBook Pro instead of USB/ExternalHD to run a working copy of OS X. }}
~ Just start up the healthy OS X (laptop) in target disk mode (hold 't' key while it powers up)
~ Connect it to the impaired Mac with the highest speed cable available (fire800>fire400>USB)
~ Start up the impaired Mac while holding the alt/option key to select the boot drive.
~ Select the connected OS X (laptop hard disk) and start er up.
~ Run disk utility and you can now use the Fix Permissions option on the impaired Mac's internal hard drive.
~ Run the OS X Combo Update (or presumably other offending update/program) and make sure to change the destination to the internal disk of the impaired Mac
~ Shut down, unplug target disk, start up, and you should be good to go.

I was in some kind of uber-kernel panic and could not start up in safe mode OR from the installation disc, and this worked! Definitely a good emergency procedure to have in your back pocket.

Note: ...target disk pairing must be in this direction. I tried setting up the impaired Mac as target and connecting it to running laptop, and it let me run the install fine, but it didn't fix the problem...must be something with permissions that the impaired Mac needs to install to itself, even if the OS is running on another disk/machine.

-T.

Mac OS X Update Fix if Interrupted and Can No Longer Boot

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple ID.