How do I install a LaTeX .sty file on OSX?

Question

I have a LaTeX project set up:

tex/
  - documents/
      - some_file.tex
  - support/
      - todonotes.sty

where some_file.tex us

Answer 1

As said before just put the custom .sty into ~/texmf/tex or in /usr/share/texmf-texlive/tex/ but don’t forget to run mktexlsr or texhash to update the local package database of LaTeX. Otherwise LaTeX won’t find it at all, unless it is in the same directory of the processed file.