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The quartz-wm window manager included with the XQuartz distribution uses the Apple Public Source License Version 2. Together with supporting libraries and applications, it forms the X11.app that Apple shipped with OS X versions 10.5 through 10.7. The X.Org software components’ licenses are discussed on the Please re-install the latest XQuartz X11 release for Leopard after installing a system software update to OS X 10.5.x Leopard.Īn XQuartz installation consists of many individual pieces of software which have various licenses. Because of this, you may experience conflicts after doing a Software Update from Apple. Since the XQuartz X11 package clobbers Apple's X11.app, their software update will clobber the XQuartz X11 package. OS X Software Updates have included some of the work done by the XQuartz project, but for various reasons, Apple cannot ship the latest and greatest version offered by the XQuartz site.
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Together with supporting libraries and applications, it forms the X11.app that Apple shipped with OS X versions 10.5 through 10.7. The XQuartz project is an open-source effort to develop a version of the X.Org X Window System that runs on macOS.
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