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
export PATH=/usr/local/bin:$PATH
brew update
brew install vim && brew install macvim
brew link macvim
You now have the latest versions of vim and macvim managed by brew. Run brew update && brew upgrade
every once in a while to upgrade them.
This includes the installation of the CLI mvim
and the mac application (which both point to the same thing).
I use this setup and it works like a charm. Brew even takes care of installing vim with the preferable options.