Q: how can I reset my password?

Welcome to the Apple Support Communities

See > http://support.apple.com/kb/HT1274?viewlocale=en_US&locale=en_US, https://discussions.apple.com/docs/DOC-4101

If you are an administrator and forgot your password, however you have "Allow user to reset password using Apple ID" set for your user. At login prompt enter your user name and password few times (the password may be anything since you do not remember it), the computer will not accept it and suggest you to reset your password using apple ID.

Administrator Password?

You can reset it.

Reset Password

Follow the instructions in the beige and green boxes.

http://pondini.org/OSX/Password.html

Note

You should now be able to log in with the new password, but you won't be able to unlock the Keychain. If you've forgotten the Keychain password (which is ordinarily the same as your login password), there's no way to recover it. You’ll need to reset your keychain in the preferences of the Keychain Access application.

http://support.apple.com/kb/TS1544

dominic23:

Kindly don't quote me verbatim without attribution, or with misattribution. Use your own words. Thank you.

Sorry Mr. Davis.

"You should now be able to log in with the new password, but you won't be able to unlock the Keychain. If you've forgotten the Keychain password (which is ordinarily the same as your login password), there's no way to recover it. You’ll need to reset your keychain in the preferences of the Keychain Access application."

If the lines pasted above is written by you and I knowingly used it, I am extremely sorry.

No if or but about it.

I usually copy and paste lines from Apple articles for the purpose of accuracy.

I will track down the source of those lines.

Once again.

Best.

No harm done. You don't need to track down the source. I'm the source.