Plug it to the ADB of your Macintosh and restart the computer.
An error occured while trying to read or create a preferences file. Try deleting the file “Contour Mouse Prefs”, or boot from a different system folder.
Driver not installed!
This control panel must be placed in the sytem folder while the Macintosh ist starting up. Check this and restart your Macintosh.
Wrong version, please restart your Macintosh first!