Kid:
Thank you so much. To be a bit more specific, I'm less concerned about the default display on the MAC. Of more concern is that when the contact is either created or edited on the MAC in the shared folder, it over-rides the "File As" setting on the Windows PC and this results in a mish-mash of sort order on the Windows PC with contacts showing up as sorted Last Name, First Name if created on the Windows PC and First Name, Last Name if created/edited on the MAC. This makes it next to impossible to delegate management of this type of function between a PC user and a MAC user.
Regards,
Kev