Mac OS X 10.5: Can‘t log in to account that has no password

After installing Mac OS X 10.5 Leopard, you may not be able to log in to a user account that has no password, if it was originally used in Mac OS X 10.2.x and migrated to Leopard after installation.

This article has been archived and is no longer updated by Apple.
  1. Start up from your Mac OS X 10.5 Leopard Install DVD. 
  2. From the Utilities menu, choose Reset Password....
  3. Reset the password for the affected account(s).

Note: Having a user account with no password is not recommended.

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