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Preview is an application developed by Apple and included with Mac OS X. It is built using Cocoa, and as such gains a lot of its functionality by using Quartz and QuickTime technologies.


  • According to Apple, Preview is the world's fastest PDF viewer.
  • Preview can display PDF files, as well as a large range of images formats, including JPG, GIF, PNG, TIFF, BMP, PICT and Photoshop.
  • As of Tiger, preview can take screenshots