TeX Live from TUG is installed in the directory /usr/local/texlive which is not visible from the Finder. But the installer creates a symbolic link to the directory of the active TeX distribution in /Library/TeX/Root. Therefore, go to /Library/TeX/Root to inspect files in your distribution.

The documentation for the active distribution is in /Library/TeX/Documentation (this is actually a link to various documentation folders in the distribution).

It is possible to store additional style files, fonts, etc., in TeX Live itself. But TeX Live is owned by root and lives in a folder which isn't writeable by users.. Moreover, it is a good idea to keep this directory pure so it can be upgraded easily when later versions are released. It is better to construct a mirror image of the TeX Live directory structure inside your Library folder and store your personal files there.

The files must be in appropriate directories. TeX Live uses a directory structure invented by the TeX working group. Suppose you want to add a extra style file named new.sty to the style files used by LaTeX. Look inside TeXLive and notice that a natural spot for this file would be

  /usr/local/texlive/2008/texmf/tex/latex/misc/

So inside your home directory's Library folder, make a series of subdirectories as follows:

  Library --> texmf --> tex --> latex --> misc

and store "new.sty" inside this misc directory.

TeX Live searches for BibTeX bib files in ~/Library/texmf/bibtex/bib; it searches for BibTeX bst files in ~/Library/texmf/bibtex/bst.

The various MacTeX packages install a Preference Pane named "TeX Distribution". This pane allows you to have several TeX distributions installed on your machine and to switch from one to the other. The pane switches the PATH to TeX for command line invocation, the MAN page pointer in Terminal, and the preferences locating various TeX applications in all GUI applications.

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