I recently decided to update a few Mac's to Mountain Lion. (Which is a story in itself. ) I had to update them to Snow Leopard from Leopard, while I was doing this I decided to update my older Mac Mini(s) (Mid 2007) to Snow leopard as well. I did this and now have no internet connection via ethernet and/or Airport. What can do to fix this? TL;DR Version: Updated Mac Mini (Mid 2007) to Snow Leopard resulting in no internet via ethernet and/or Airport. Side Note - It shows the ethernet as being connected despite no internet connection.