Password Help

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Last post
Last seen: 18 years 6 months ago
Joined: Nov 29 2005 - 06:27
Posts: 1
Password Help

I have recently aquired a second hand imac, however I am un-able to re-install the OS because access is denied due to previous passwords. I have tried strating up from the OS but with no luck, any suggestions???

moros's picture
Last seen: 12 years 5 months ago
Joined: Jan 21 2005 - 08:16
Posts: 65
It seems to me that a previou

It seems to me that a previous owner has set an open firmware password to prevent people booting of an OS X CD and resetting the admin password.

IIRC the way to break this is to add or remove a stick of RAM but it may be worth googling this in case im wrong Blum 3


The Czar's picture
Last seen: 13 years 3 months ago
Joined: Dec 20 2003 - 10:38
Posts: 287
If I'm not Mistaken....

If you hold down command-option-P-R at startup, and continue to hold them down for 3 - 5 successive boot chimes, won't that reset all the OF and PRAM settings back to default?


The Czar

catmistake's picture
Last seen: 2 years 7 months ago
Joined: Dec 20 2003 - 10:38
Posts: 1100
Single user mode

boot to single user mode... and see who the users are...

then when you get to the prompt,
ls /Users

the names of the directories there are likely the user names... so just reset the passwords for one of the users (hopefully, an administrator login)

passwd (user name)

and you will be prompted to enter a new password for that user

after... just exit

let the system complete the boot

and log in as that user with the new password, create a new account for yourself, make yourself the admin... and you're good

dankephoto's picture
Last seen: 11 months 3 weeks ago
Joined: Dec 20 2003 - 10:38
Posts: 1899
2 different passwords, which is it?

You mention a password prompt, when does this prompt appear? When the computer is first started up? Or when the OS is loading/has loaded?

If the former, that's the hardware OpenFirmware password, which is reset by adding or subtracting a stick of RAM, then rebooting the Mac. If the latter, the OS-level password is reset from an OS install CD/DVD using the included PW reset utility. I forget the exact method, but once the CD's installer has launched poke around the available menus for the "reset password" (or simliar) command.

dan k

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