MacTeX is a complete, easy-to-install TeX distribution for MacOS X on both PPC and Intel platforms. The .dmg file is an install package for Apple's installer. The package contains all of TeX-live 2007, with some front-end applications: TeXShop, LaTeXit, BibDesk, i-Installer, and Excalibur.

Beware: the download is large (ca. 700Mbytes).

See also mactextras.

The author is TUG TWG-MacTeX.