Symptom
If you select a target volume in the Apple Remote Desktop (ARD) 1.0 Installer on which a later version of Apple Remote Desktop is already installed, an alert box with this message appears:
"There are newer versions of some of the software packages in 'Apple Remote Desktop Admin' already installed on the volume 'Macintosh HD.' This software does not allow older versions to be installed on top of newer versions."
Note: This also applies to ARD Client. In this case, the message indicates Client rather than Admin.
Solution
Remove ARD by following the instructions in technical document 107159, "
Apple Remote Desktop: How to Uninstall". Once ARD is removed, reinstall ARD 1.0 and then install the necessary updates.
Notes
1. The Install button will read Upgrade, which is normal in this situation.
2. After reinstalling 1.0, the later updaters should be run again.
3. The ARD 1.0 Installer will install properly onto Mac OS X 10.2.
4. If ARD 1.0 is installed on Mac OS X 10.2, do not attempt to use the Preference Pane before updating to 1.1.