I am using OS X 10.9.1 (Mavericks).
What are the systematic steps to install to Gvim or MacVim in Mac OS? If you write the steps using 1, 2, 3, ..., it would be easy
That Macvim is obsolete. Use https://github.com/macvim-dev/macvim instead
See the FAQ (https://github.com/b4winckler/macvim/wiki/FAQ#how-can-i-open-files-from-terminal) for how to install the mvim script for launching from the command line
mvim