XQuartz

XQuartz is an open-source implementation of the X Window System for macOS. It provides an X server and a collection of X11 client applications, enabling macOS users to run software that uses the X11 display protocol. XQuartz is the standard X11 solution for macOS and is maintained by the XQuartz Project.

The distribution includes the X.Org X server, X11 libraries, and a suite of X11 applications. It integrates with macOS by providing a native windowing integration that allows X11 windows to appear as regular macOS windows. It supports SSH X forwarding, clipboard integration between X11 and macOS, and other interoperability features.

XQuartz is available as a standalone installer from its website. After installation, XQuartz runs as an X server in the background and X11-based applications can be started from the command line or via XQuartz-aware launchers. Users can configure preferences such as display resolution, focus behavior, and clipboard settings.

Development and licensing: XQuartz is an open-source project with community contributions. It follows X.Org standards and macOS compatibility. Documentation and release notes are published on its website, with support through mailing lists and online resources.