Install X11 Application

X11 Installation and Execution

X11 is available as an optional install on the Mac OS X v10.3 Panther, and Mac OS X v10.4 Tiger install disks.
Run the Optional Installer, select the Applications/X11 option, and follow the instructions.

Note1: We Recommend you run a "Software Update" immediately after installing X11. A software update is is necessary for OS X versions 10.4.8 or newer. Follow this link for instructions on "Updating Your Software".

Note2: X11.app may be displayed as X11 in the Applications/Utilities folder, depending on the Finder preference "Show all file extensions."

Other X11 Resources
X11 for OS X 10.3 Panther
Unofficial X11 for OS X 10.4 Tiger (after installing X11Tiger.zip, you need to install this update)