Q6: What is this X11 thing and how do I install it?
A: To be able to use OpenOffice.org X11 for Mac OS X / Darwin PPC, you have to have Apple X11 installed. It allows graphical UNIX programs to be run in Mac OS X.
The X11.app is located in Application -> Utilities folder.
If you do not have X11 installed, Tiger users can install it from the Mac OS X 10.4 install DVD by running the Optional Installs package. You may need to scroll down in the Mac OS X Install DVD file listing to see the package. Once the optional installer is running, select X11 from the Applications list. For more information on how to install X11 see: Apple Support Article 301229. The interesting part begins below the title More custom reinstallation options with Mac OS X 10.4.
Panther users will need to download X11 from Apple's webpages.
Intel or 10.4.x cannot install the X11User.dmg that Apple supplies on its web site. It will tell you newer software is already installed. Instead insert your installation disc 1 and look up
/Volumes/Mac OS X Install Disc 1/System/Installation/Packages/X11User.dmg
on the disc. Source:
http://occy.net/node/166.