NVIDIA drivers are provided by Apple and they are updated with every OS X maintenance update. The latest OS X version for a 2013 MacBook Pro is 10.8.3, so open > Software Update, and install all updates.
This system is a bit different than Windows and it may cause that you aren't running the latest driver that NVIDIA has released for your graphic card. Anyway, Apple often updates the graphic card drivers, so enjoy the MacBook and don't worry about the graphic drivers