On Jul 17, 2005, at 1:10 PM, Dana Sibera wrote:
On 18/07/2005, at 1:54 AM, Elizabeth Lalli-Reese wrote:
Hi!
I have tried to start up the computer from an external drive and
the Open Firmware password prevents me from booting from another
CD/drive. I think this computer was used in a school/library
because it's locked down pretty well. If I can get past the Open
Firmware password, I could boot from an external source. Any ideas?
The one that worked for me on my iMac 400 to reset the open
firmware password was:
1. disconnect power & flip the iMac upside down
2. remove one of the RAM sticks from the iMac (I have 384MB in it,
I removed the 128MB stick)
3. flip the iMac back up normally & plug in
3. on the *first boot* immediately after removing the RAM, hold
down option-apple-P-R and let it chime the three times
for me, that removed the openfirmware password I'd set. Just tried
it again a few minutes ago to be sure it worked, and it
cleared it successfully.
I do not have the URL, but Apple describes exactly this process in a
knowledge base article with exactly the result Dana describes.
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