シンボリックリンクが重層的に貼られている.
$ which lualatex >/usr/texbin/lualatex $ ls - l /usr/texbin /Library/TeX/Distributions/Programs/texbin -> ../.DefaultTeX/Contents/Programs/texbin $ ls -l /Library/TeX/Distributions/Programs/.DefaultTeX/Contents/Programs/texbin .DefaultTeX/Contents/Programs/texbin -> x86_64 $ ls -l /Library/TeX/Distributions/Programs/.DefaultTeX/Contents/Programs/x86_64 x86_64 -> ../../../../../../../usr/local/texlive/2014/bin/x86_64-darwin
ということで/usr/local/texlive/2014/bin/x86_64-darwinに本体がいた.