Linux System - Table 12 > Packages - Table 7 > x11-tools

X11 for Mac OS X is an implementation of the X Window System that makes it possible to run X11-based applications in Mac OS X. Based on the X.org Foundation releases -- the leading reference implementation of X11 -- X11 for Mac OS X is compatible, fast, and fully integrated with Mac OS X. It features includes full X11R7 compatibility including an X window server, Quartz window manager, libraries, and basic utilities such as xterm. It is optional but installed by default on Mac OS X v10.5 Leopard. The X11 SDK headers are available as part of the Xcode Developer Tools.