X11 for Mac OS X offers a complete X Window System implementation for running X11-based applications on Mac OS X. Based on the de facto-standard for X11, the open source XFree86 project, X11 for Mac OS X is compatible, fast and fully integrated with Mac OS X. It includes the full X11R6.6 technology including a window server, libraries and basic utilities such as xterm. Native Aqua and X11 applications run side by side on the Mac OS X desktop. You can cut and paste between X11 and Aqua windows. You can minimise X11 windows to the Dock â?? even with the â??Genie Effectâ??. You use the Aqua window controls to close, minimise, and zoom X11 windows. And of course, each X11 window comes with its own carefully rendered drop shadow. Experts may choose to replace the native Aqua window manager with their own familiar, standard X Window Manager.