...
If you do not use TeXworks, it is important that you install your LaTeX editor after you have installed LaTeX - since the editor will search for and set up the correct paths to these LaTeX elements.
Mac
It is very easy to install LaTeX on a Mac since all elements come in one package. You only have to:
...
If you use a Mac, I recommend you to use the built-in TeXShop editor (TeXworks is a "clone" of TeXShop) - and the built-in BibDesk reference manager. (You find them under Applications -> TeX).
LaTeX in the cloud
It is also possible to use LaTeX as a web application without installing anything. The are at least three different appliucations
I do not have much experience with these applications so I cannot give much advise.
Happy TeXing!!