OKI C7550 Benutzerhandbuch

With the exception of Job Accounting, the utilities on the Drivers CD 
are unavailable for Mac OS 10.3 and will only run on Mac 9.x or 
Classic OS.

Once the Job Accounting utility has been set up by your Network 
Administrator, it is transparent to the operation of the printer driver on 
your OS 10.3 system.

For more information on Job Accounting, see the “Job Accounting 
Technical Reference” on the Manuals CD supplied with your printer.