Resetting your keychain in Mac OS X

check keychains for problems using Keychain First Aid:

Open Keychain Access, located in the Utilites folder in the Applications folder.


1)Choose Keychain Access > Keychain First Aid.

2)Enter your user name and password.

3)Select Verify and click Start. Any problems found will be displayed.

4)If there are problems, select Repair, and then click Start

To change the Keychain First Aid settings, choose Keychain Access > Preferences, and then click First Aid.

Symptoms
If Keychain First Aid finds an issue that it cannot repair, or if you do not know your keychain password, you may need to reset your keychain. (Resetting a keychain sets aside the original default keychain file and creates a new one.)

Resolution
>>>To reset your keychain in Mac OS X 10.4, Mac OS X 10.5, and Mac OS X 10.6 Snow Leopard or later:

Open Keychain Access, which is in the Utilities folder within the Applications folder.
1)From the Keychain Access menu, choose Preferences.
2)Click General, then click Reset My Default Keychain.
3)Authenticate with your account login password.
4)Quit Keychain Access.
5)Restart your computer.

>>>To reset your keychain in Mac OS X 10.3 through 10.3.9:

1)Open Keychain Access, which is in the Utilities folder within the Applications folder.
2)From the Window menu, choose Keychain First Aid.
3)Click Options...
4)Click Reset My Keychain, which is under the General pane.
5)Authenticate with your account login password.
6)Quit Keychain Access.
7)Restart your computer.