For questions about using TeX on operating systems sold/made by Apple.
Mac is short for Macintosh, a brand of computers created and sold by Apple.
- mactex an open source TeX distribution for Mac OS X, based on texlive
- texshop an integrated text editor and PDF previewer for the Mac designed for editing all kinds of TeX documents.
- macports for questions related with the MacPorts Project and TeX.
- aquamacs for questions related to the Aquamacs editor for Mac OS and TeX.
Note that there is an Apple-specific stackexchange site.