Homebrew/homebrew-science — pull request #856 by peterl94 (2014-05-03 19:17:39+00:00)
Title: OCE does not use X11 on Mac OS X

By default, OCE uses Cocoa instead of X11 on Mac OS X, and so "depends_on :x11" is useless, unless you turn off OCE_OSX_USE_COCOA. However, I don't see any reason why anyone would wan't to do this.