I'm having difficulty in figuring out how to install the TikZ package on my mac (i just need to draw some diagrams under the environment {tikzpicture}), the file that I have downloaded (http://sourceforge.net/projects/pgf/) is not just a .sty file. There are lot of files inside the folder. Furthermore, I have only installed MacTeX.
Sorry if the question is trivial and thanks in advance.
Best Answer
You could start Tex Live Utility (a program on your mac and part of MacTeX) and update all packages.