Apple released an update to its X Window System software, X11 1.1.3, on Monday. X11 lets you run X11-based applications in Mac OS X. The updated version includes fixes that allow for better GLX stereo visual handling, improvements to offscreen GLX Pbuffer and Pixmap rendering, and a fix for font issues introduced in the X11 1.1.2 update.
X11 1.1.3 requires Mac OS X 10.4.8 or higher, and is a free download on Appleis Web site.