Summary: Like others here, I bought the Brother MFC-5840CN because I have Macs and Windows PCs and a network for the whole bunch. I like that the printer installed fine for Mac OS 8.6, OS X 10.3, Windows 98SE, and Windows 2000.
Summary: Don't waste your precious time and money on any brother products. I did - learn from my mistake. Purchased a Borther MFC from staples. In 13 months, the printerhead malfunctioned. Called Brother to see course of action - said nothing I can do.
Summary: Tried setting this up with Linux. Took hours of searching docs and webpages and got no help from the company even though they have Linux drivers and the manual describes (with inaccurate information) how to use the printer with Linux.