I have the seen this message twice, with 2.66 GHz Intel core 2 Duo
running Snow Leopard (10.6.2), but restarting solves the problem. I
have wondered what might have caused it.-and the iMac is fairly new,
does not have memory intensive programs or do I run complex
scenarios.

 No disruption whatsoever of any other kind has occured. Just for
your  information if it may help diagnose.


On Mar 2, 4:59 pm, Dulcis <[email protected]> wrote:
> My iMac has Kernel Panic trouble.
>
> It's an Indigo G3, 500-MHz PowerPC CPU, 1 GB SDRAM, made in summer of
> 2001. Model M5521; model identifier PowerMac4,1; M8582LL/A*.
>
> When I press the startup button, the following appears in dimmed (non-
> selected) white print on a black screen (console mode). The text
> doesn't scroll up; it appears complete and stationary.
>
> panic(cpu ): Unable to find driver for this platform: "PowerMac4,1".
>
> Latest stack backtrace for CPU 0:
>         Backtrace:
>                 0x00083498 0x0008397c ... (more of same)
>
> Proceeding back via exception chain:
>         Exception state (sv=0x00475500)
>                 PC=0x00000000; MSR=0x0000D030; ... (more of same)
> XCP=0x00000000 (Unknown)
>
> Kernel version:
> Darwin Kernel Version 7.9.0:
> Wed Mar 30 20:11:17 PST 2005; root:xnu/xnu-517.12.7.obj~1/RELEASE_PPC
>
> Superimposed over the last three lines of this, and continuing on, is
> the following, this time with the text selected:
>
> You need to restart your computer. Hold down the Power
> button for several seconds or press the Restart button.
>
> This is repeated in French, German, and Chinese.
>
> On top of this lies another layer of text, with the following:
>
> No debugger configured  - dumping debug information
> MSR=00001030
> Latest stack backtrace for cpu 0:
>         Backtrace:
>                 0x00083498 0x00083B48 ... (more of same)
> Proceeding back via exception chain:
>         Exception state (sv=0x00475500)
>                 PC=0x00000000; MSR=0x0000D030 ... (more of same)
> XCP=0x00000000 (Unknown)
>
> Kernel version:
> Darwin Kernel Version 7.9.0:
> Wed Mar 30 20:11:17 PST 2005; root:xnu/xnu-517.12.7.obj~1/RELEASE_PPC
>
> panic: We are hanging here ...
>
> Holding the button down shuts down the computer. When the button is
> pressed again, the startup tone sounds, the screen lights up (grey),
> the Apple icon appears, and the screen goes black again with the above
> text in white. There is no escape from this cycle.
>
> The OS is X 10.3 and the firmware is 4.1.9.
>
> Pressing Command-S at startup to enter single-user mode yields:
>
> IOKit Component Version 7.9
> Wed Mar 30 20:07:52 PST; root(rcbuilder):RELEASE_PPC/iokit/RELEASE
> panic(cpu 0):Unable to find driver for this platform: "PowerMac4,1".
> etc. as above.
>
> But no localhost# prompt appears, so I'm no further ahead. Nor does
> typing fsck -f help.
>
> I can't try to start up from the original OS CDs because I don't have
> them. The Panther Install and Restore disk that I have is a DVD, but
> the iMac's slot-loading optical drive takes only CDs. In any case that
> drive is not working properly (it won't fully eject a disk even when
> the paperclip method is used). I installed OS Panther by loading the
> DVD in the Superdrive of a Power Mac G4, and connecting the iMac to
> the Power Mac by FireWire disk mode. I can't repeat that because now I
> can't even get to the iMac's Finder.
>
> The panic occurred when I was trying to delete a large number of files
> and nothing seemed to be happening, other than the spinning of the
> beachball. So I pressed the reset button — evidently not a good idea.
>
> A few days before this I had installed RokIt Mac Software for a RokIt
> Wireless-G USB adapter card for Apple Mac and Linux  (the iMac doesn't
> have an Airport card). I was unable to get the adapter to work,
> although a MacBook in the same location picked up the signal from an
> Airport Extreme device in the house with no difficulty. Perhaps the
> RokIt software is the source of the problem. The adapter was not
> plugged in when the kernel panic occurred.
>
> If I loaded my Panther OS Install and Restore DVD disk in an external
> FireWire optical drive, or an external FireWire hard drive, would the
> iMac find the startup folder there and boot up?
>
> I would appreciate any suggestion of a way to escape from this problem.

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