Apple has released the third public beta of X11, the Windowing system for OS X.

The software makes it possible to run X11 applications on Mac OS X.

Apple's X11 is based on the open source XFree86 project. This is the commonest implementation of X11. X11 helps developers port Linux and Unix applications to the Mac and lets users operate Aqua and X11 applications on the same desktop.

This version offers a number of enhancements, including: new commands; an option to quit X11 without presenting a warning dialogue; keyboard mapping with dead keys has been fixed; and Windows can be resized by a user to any size and not limited by the height of the Dock.

Other improvements include: hardware accelerated scrolling in 16-bit mode now works and more stability in X11's X Server component. A full list of changes is available online.