Reconfigure the local KDC

Mac OS X 10.6 Snow Leopard

1. Launch Keychain Access located in the Utilities folder
2. Search for com.apple.kerberos.kdc in the System keychain and delete all 3 items
3. Run sudo rm -rf /var/db/krb5kdc /var/db/.configureLocalKDC
4. Reboot or run sudo /usr/libexec/configureLocalKDC