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OS X El Capitan - Wikipedia
How to download and install macOS - Apple Support
OS X El Capitan - Technical Specifications - Apple Support
Download OS X El Capitan 10.11.6 Combo Update - Apple Support
Apple Announces OS X El Capitan with Refined Experience & Improved ...
How to install OS X El Capitan | Macworld
OS X El Capitan: The smart person's guide | TechRepublic
OS X El Capitan review: A swifter, more streamlined take on OS X
OS X El Capitan review | iMore
Apple OS X El Capitan Review | PCMag