MacTeX
www.tug.org/mactex/2011
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
MacTeX is a product produced by the MacTeX TeXnical working group of the TeX Users Group (TUG). It is the Macintosh component of the TeX Collection DVD, the reference edition of TeX distributed by TeX User Groups across the world. The reference edition runs on Mac OS X, Windows, GNU/Linux, various BSD Unix systems, and most other computer architectures.