1. Install MPlayer OSX . Basically just need to drag file.dmg in your Applications folder. 'Applications"
2. Double-click on video file which has a.NSV (Video.nsv for example), then click the button "Choose Application ..."To warn of the window that opened.
3. In the box that opens, navigate to the folder Applications, select from the list of applications MPlayer OSX and press OK .
4. Now you can see a video file. NSV, with MPlayer on an operating system Mac OS X .