How to turn off Unknown Name and Withheld User in the Mac OS X - CUPS web interface
By default, CUPS has increased security and privacy settings that may mean that the Document Name (Name) and User (Username) are anonymised in the CUPS Web interface as shown below.
This behaviour is controlled by the JobPrivateValues directive in the cupsd.conf
To reveal the Document Name and Username in the Web Interface, add the appropriate
JobPrivateValues setting to the
<Policy> section. You can do this by editing the cupsd.conf file directly or via the CUPS administration interface > Administration tab > on right side under “Server” and click the button called “Edit Configuration File”.
<Policy default> JobPrivateValues none ...
You may want to limit this information to specific users via the JobPrivateAccess directive.