Install custom packages in MacTex

readme.md

• Where do I place my own .sty or .cls files, to make them available to all my .tex files?
• Example: Signal flow building blocks
• /usr/local/texlive/texmf-local/tex/latex/signalflowlibrary
• $ mktexlsr

system.tex

\documentclass[crop]{standalone}
\usepackage{signalflowdiagram}

\begin{document}
  \begin{signalflow}{Branches}
    \begin{scope}
      \node[adder]  (add)                       {};
      \node[input]  (in1) [above left from=add] {$x_1(t)$};
      \node[input]  (in2) [below left from=add] {$x_2(t)$};
      \node[output] (out) [right from=add]      {$x_1(t) + x_2(t)$};

      \path[r>] (in1) -| (add);
      \path[r>] (in2) -| (add);
      \path[r>] (add) -- (out);
    \end{scope}
  \end{signalflow}

  \begin{signalflow}{Block diagram}
    \begin{scope}
      \node[input]  (in)                          {$R(s)$};
      \node[adder]  (add)   [right from=in]       {};
      \node[coordinate]  (pt1)   [right from=add] {};
      \node[coordinate]  (pt2)   [right from=pt1] {};
      \node[filter] (plant) [right from=pt2]      {$\frac{G(s)}{s+1}$};
      \node[node]   (tap)   [right from=plant]    {};
      \node[output] (out)   [right from=tap]      {$C(s)$};
      \node[filter] (fb)    [below left from=tap] {$H(s)$};
      \node[filter] (neg)   [left from=fb]        {$-1$};

      \path[r>] (in) -- (add);
      \path[r>] (add) -- (plant);
      \path[r]  (plant) -- (tap);
      \path[r>] (tap) -- (out);
      \path[r>] (tap) |- (fb);
      \path[r>] (fb) -- (neg);
      \path[r>] (neg) -| (add);
    \end{scope}
  \end{signalflow}
\end{document}

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