Playing NSV (Nullsoft Streaming Video) files in OS X is actually quite easy. You just have to download and install MPlayer for OS X. For complete instructions, keep reading.
- The installation is a snap – just drag MPlayer OSX from the .dmg into your Applications folder.
- Double-click a .nsv file and click the Choose Application… button when the warning window appears
- Navigate to your Applications folder, select MPlayer OSX from the list, and click OK
- MPlayer for OS X will launch and you’ll be watching your .nsv video.