I want to install only the LaTeX compiler because I don't care about the additional software that comes with MacTeX.
I'm going to use Latexian for creating
Is this option possible?
You can install BasicTeX, which is a subset of MacTeX that weighs in at only 64MB. Description from the webpage:
BasicTeX contains a small but core selection of LaTeX packages. Additional packages can be installed using
or, if you prefer a GUI frontend for managing your packages, TeX Live Utility.
For Mac OS X operating system, the MacTex distribution is recommended:
Then, while installing MacTeX you can choose the custom installation and install just TeX Live 2012. By the way I recommend to disable only GUI Application.