Brother MFC-820CW - Manual (Page 143)

Wireless installation for Macintosh ®
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9
25
Click Go, then Applications.
26
Double-click the Utilities folder.
27
Mac OS ® X 10.3 or greater users:
Double-click the Printer Setup Utility icon.
For Mac OS ® X 10.2.x users:
Double-click the Print Center icon.
28
Click Add.
Mac OS X 10.2.4 to 10.3 users; go to step 29.
Mac OS X 10.4 users; go to step 30.