Kimberly.3D:

There are two different programs that you can use:

One is Ditto. You can read about it in the Macintosh forum here at Renderosity:

www.renderosity.com/mod/forumpro/showthread.php

 or go download it here:
http://web.mac.com/ilikecomputing/SoftwareDev/dittoGUI.html

The other one is a program in the store here:

www.renderosity.com/mod/bcs/index.php

or if the old runtime is on the same computer you can just add it in Poser. It works at least in Poser 6 and newer and I believe in Poser 5 as well.