MacTeX Technical Working Group:
TeX on Mac OS X

Implementations

i-Installer: installing, configuring, and running TeX on Mac OS X

CMacTeX: an integrated suite of programs for implementing TeX on the Mac

Front-end Editors

TeXShop   |   iTeXMac   |   OzTeX   |   Mac-Emacs   |   Lyx/Mac   |   SciTE

Typesetting Systems

The XeTeX Typesetting System   |   Scientific Assistant

Bibliography Managers

BibDesk

Tools & Services

TeX Tools   |   Equation Service   |   LaTeX Equation Editor   |   LaTeXiT

Fonts

FontForge

Templates

Templates for TeXShop and iTeXMac

TeX on Mac OS X: the most simple beginner's guide

Online Tutorial

Online tutorials on LaTeX