Brother MFC 8700 - Manual (Page 164)

18 - 2 U S I N G B R O T H E R M A C H I N E W I T H Y O U R A P P L E I M A C
6 Click Install MFC Print Driver to begin the installation and follow the
instructions on the screen.
7 After you have installed the Driver, click View On-Line Documentation
for operation instructions.
Restart your Macintosh/iMac so it recognizes the new drivers.