Brother MFC 7840W - Manual (Page 68)

Wireless configuration for Macintosh ® using the Brother installer application
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i Choose the machine you wish to configure, and click Next. If the list is blank, check if the access point
and the printer are powered on, and then click Refresh.
Note
The default Node name is “BRNxxxxxxxxxxxx”.
j The wizard will search for wireless networks available from your printer. Choose the access point you
wish to associate the machine with, and then click Next.