Wanna have a nonstop rollercoaster ride? Here we go. Turn your desktop into an amazing nonstop Roller-coaster with this Mac OS X Screensaver. The Quartz Composer Plugin brings together a rich set of graphical and nongraphical technologies, including Quartz 2D, Core Image, Core Video, OpenGL, QuickTime, MIDI System Services, RSS (Really Simple Syndication), or XML. The install process is virtually identical wether you're running Yosemite , Mavericks, Mountain Lion, Lion, Snow Leopard or Leopard.