This is SAO/HEAD DS9 2.2 and XPA 2.1.3 for MacOS X.  Packaged up in the .pkg format for use
with the OS X installer.  Binaries are installed in /usr/local/bin, libraries in 
/usr/lib.  More info is in an included readme.

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/