There is a thread here:
How to Install and run a XulRunner Application on Mac OS X?
...in which a user mentions having trouble uninstalling XULRunner 7 so he could then install XULRunner 6. Unfortunately he just says he figured it out, but doesn't say how. It appears that I cannot private-message or email that user (CIRK).
So, does anyone know how one removes it, or at least get OS X to allow the install of XULRunner 6?
As a side-note, removing the /Library/Frameworks/XUL.framework directory does not work.
Thanks in advance.