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Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF, but is also great for viewing any PDF file.

Skim includes many features and has a great user interface.

What's New

Version 1.4.31:
  • Preference to reload changed files automatically
  • Allow switching between full-screen and presentation modes on macOS 10.13 High Sierra
  • New hidden preference to display page bounds in the menu bar
  • Fix returning to position on macOS 10.12 Sierra
  • Fix some localizations
  • Fix preview tool tips for links and anchored notes


  • OS X 10.6 or later

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4.6 109


Current Version (1.x)


Downloads 332,335
Version Downloads 955
License Free
Date 01 Dec 2017
Platform Intel 64 / OS X / Intel 32
Price Free