Brother MFC-9320CW - Manual (Page 109)

Network printing from Macintosh using the BR-Script 3 driver
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h From the Printer Model pull-down list choose your model. For example, choose
Brother MFC-XXXX BR-Script3.
i Click Add and the printer will be available from the Printer List. The machine is now ready to print.
(Mac OS X 10.3.9) (Mac OS X 10.4.x)