This is X11IRAF 1.3.1 for MacOS X, packaged up in .pkg format for use with
the MacOS X Installer.

In my experience, XGterm crashes when trying to display graphics if its app-defaults exists.
I no longer install it, though it is included for the brave.

Direct comments about this installer to:

Marcos Huerta
marcosh@rice.edu

--
Please visit my IRAF Macintosh web page at

http://www.owlnet.rice.edu/~marcosh/iraf/