Just in case any Mac users with 3DConnexion SpaceNavigators missed it - a 64 bit driver (version 1.6.0) for OS X was posted on their web site 2 days ago.
http://www.3dconnexion.com/service/drivers.html
AC 28 USA and earlier • macOS Sequoia 15.3, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
One of the forum moderators