Unity Free with Git

How can I use github with unity? From browsing around the web, I have found that I need to set the version control mode to “meta files”
However, when I go into this setting, the options are “Visible meta files” or “hidden meta files”. Can anyone help?

What’s new in Unity 4.3

Asset Pipeline: .meta files are now always turned on. From Project Settings → Editor you can choose to hide them if you are not using version control.