There is currently no Aqua version of xlispstat available. You can, however, build the Unix/X11 under OS X if you have the development tools and the Apple X11 server and SDK installed. The following steps should build such a version installed in /usr/local (based on suggestions from Bill Duckworth): 1. Install the Apple Developer Tools (the CD came with your MacOSX 10.2 installation CDs, installation takes some time) 2. Download and install the X11 server and the X11 SDK from Apple http://www.apple.com/macosx/x11/download/ The X11 SDK link is found on the bottom right side of this page. 3. Obtain xlispstat-3-52-20.tar.gz (or a newer version if available) via ftp from ftp.stat.umn.edu. Use 'anonymous' as the username and your email address as the password. Go to /pub/xlispstat/3-52/ to get the file. These instructions assume you've downloaded this file to your Desktop. 4. Double-click the file xlispstat-3-52-20.tar.gz. This should unstuff it with Stuffit Expander 7.0. You will then have a folder on your Desktop called xlispstat-3-52-19. 5. Launch X11 6. type cd Desktop/xlispstat-3-52-20/ 7. type limit stacksize 8000 8. type ./configure 9. type make This will take several minutes. 10. type sudo make install You'll have to enter your password when prompted. 11. type cd 12. type pico .cshrc This will open the file .cshrc in the pico text editor. You'll need to add the line set path = ( $path /usr/local/bin/ ) to this file. If a set path line already exists, you can just add the /usr/local/bin/ portion to what is there. 13. Hit Control+x to exit the pico text editor. It will prompt you to save the changes you made to .cshrc (save the changes and keep the file name the same; that is, .cshrc)