Multimedia packed with features Quicktime is a program for Mac machines that runs all sorts of media files with ease. OS X El Capitan OS X Yosemite OS X Mavericks OS X Mountain Lion Mac OS X v10.7 Lion Mac OS X v10.6 Snow Leopard Mac OS X v10.5 Leopard Mac OS X v10.4 Tiger Mac OS X v10.3 and earlier Mac OS X Technologies Classic Mac OS (OS9, OS8 & System 7) Photos for Mac QuickTime Safari Front Row. You can add codecs to play almost any file type. These include video, music, and online streams. Quicktime runs on Mac machines and is primarily used for playing different media files.