(Liaison for Desktops, Alienware, Monitors)Quick link for Manuals and DriversProSupport Plus for PCs and Tablets
I run a house full of Macs and PCs with two dell printers, one of them being a M5200N and I can confirm the T630 driver works fine in OS X.
The M5200N also works with Bonjour networking right out of the box. A+++ Dell!!