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One possible fix for admin password corruption System
Tonight, something happened to half-corrupt the password of my one and only one admin account. I could log in and wake from sleep, but the password could not be used to authenticate for any admin tasks. Not through GUI things like System Preferences, and not through sudo. I looked through the hints here, but didn't find anything outright.

I booted from the OS X CD and repaired the disk (and it found two files with illegal names) and repaired permissions. I also used the Reset Password utility to change the password. However, that didn't change anything. I also tried booting in single user mode to use passwd, but that didn't do anything at all (it didn't even ask me for a new password; it just exited).

However, another hint noted that if the master password is set (via the Security System Preferences panel), you can reset a password through the login screen by entering bad passwords a few times. After a few bad login attempts, OS X asked me for the master password, which I did know and it did accept. It then asked me for a new password, and then warned me that I'd get a new default keychain. I think this last part was an important aspect of what went wrong.

I then logged in, and everything worked again. However, I my old keychain was still in existence and working.
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One possible fix for admin password corruption
Authored by: SOX on Oct 11, '05 09:02:26AM

Something like that "half-word" happened to me. I caused it when I changed the UID and GID of the user. I could do somethings but not others (like sudo)

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One possible fix for admin password corruption
Authored by: barrysharp on Oct 11, '05 12:02:03PM

This happened to me some time ago. Ever since I've ensured that I have a secondary Admin account defined from the get-go so that it can be used to rescue me and fix things. I've never had to rely on this secondary Admin account since my last mishap but I'm sure it will hit me at some time as it did you.

Regards... Barry Sharp

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One possible fix for admin password corruption
Authored by: maguirer on Nov 17, '05 04:55:34PM

This just happened to me yesterday. I'm glad I found this, because I can use the tips.

I also created a secondary Admin account from the get go. However, although I've never used that account, it too has "lost" its admin privileges. I'm guessing it would've affected any Admin account. Netinfo says we're in the admin group, but running "id" says we're not.

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