On OS X 10.6 Launching AC 7, 8, or 9 Warning message appears, "No WIBU-KEY driver found. (501)”, ARCHICAD cannot be launched.
Wibu key driver 6.00e was installed on that machine during the installation of ARCHICAD 16. This driver cannot run with the above mentioned old ARCHICAD versions.
Install Wibu key driver 6.00a from the GRAPHISOFT Wibu driver download site: