I'm trying to add a commutative diagrams .sty, called diagrams.sty, and TeX is not able to locate it. I placed it in /usr/local/texlive/2012/texmf-dist/tex/latex, where I see lots of other packages stored. Am I placing it in the wrong directory? I'm on a Mac and am compiling with pdflatex via terminal.
Other questions similar to this haven't resolved my problem. Thanks in advance.