I've kept my VIM/dot files online for a while in my Github but I recently spent some time to update my .vimrc file.
One of the changes that bugged me on OSX is that it ships with VIM 7.2 which doesn't have ColorColumn support. I like highlighting the 80th column in Python. As I discovered, the code to do this is :
{% highlight vim %} if version >= 730 autocmd FileType python set cc=80 hi ColorColumn ctermbg=darkgrey guibg=darkgrey endif {% endhighlight %}
Another change was to add Gundo support. This adds a window to navigate your undo tree, an incredibly useful feature.