Did you uninstall the WIBU that is delivered with 9 and install the updated WIBU from here:
http://www.archicadwiki.com/TechNotes/Running_both_AC_10_and_AC_9_on_Intel_based_Macintosh?highlight...
This WIBU driver for Intel Mac supports both 9 and 10 (just not at the same time). Have had no problems at all on the MacBook Pro that I installed it, 9 and 10 (and much more) on.
Regards,
Karl
PS Before you say it --- yes, I agree - I have no idea how Graphisoft expects us to find MacTel resources when they are scattered all over the place on different web sites with no central location / index.
One of the forum moderators
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB