Follow these steps to resolve this behavior:
Create a Root User account on the computer using the steps outlined in the Apple technical article at the following URL:
- Log out of your current Administrator account and log in as the Root User.
- Create a new folder on the Desktop and name it Applications (type a 'Space' and type 'Applications').
- Copy the QuarkXPress 6.1 folder inside this folder.
- Run the Updater for QuarkXPress 6.5.
The QuarkXPress 6.5 Updater application cannot locate the QuarkXPress 6.1 folder. This can happen if permissions for the user do not allow application installation.