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Protect your Mac using an Open Firmware banner
This method of blowing away the OF password doesn't work on all Macs -- specifically, the "table lamp" G4 iMacs. I did everything that I could think of and could find online, including removing the memory overnight, but nothing worked.
Protect your Mac using an Open Firmware banner
It worked very well for me. I was able to reset the OF of a 17" imac.
Protect your Mac using an Open Firmware banner
You have to be sure to remove the system memory chip as well as the user memory chip. This requires you opening up your case, so be weary.
Protect your Mac using an Open Firmware banner
I must have had a unique iMac then, as I opened the case, removed both sticks of memory, disconnected every wire and connector, removed the battery, left it open overnight, and it still wouldn't forget the OF password.
Protect your Mac using an Open Firmware banner
The RAM config must change: i.e.: the total amount of RAM must change between cold restarts AND hold cmnd-opt-p-r for 3+ chimes.
Protect your Mac using an Open Firmware banner
What you are suppose to do is take out all the memory, and then boot the machine without any memory. Shutdown by holding the power key for 5 seconds, re-insert memory and it should work. |
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