For OS X 10.5 and later - Snow Leopard, Mountain Lion, Mavericks, or Yosemite - download and run this uninstaller.ģ. Verify your OS X version by clicking the Apple icon in the upper left and selecting About This Mac.Ģ. YouTube, Netflix, and a host of others have either made the shift to HTML5 video or use alternative technologies, like Microsoft's Silverlight.ġ. Flash is easy to remove and most of your favorite sites and Web services will continue to work fine without Flash installed.