Importing contacts from Mac "Contacts" to a Postbox Address Book.

[Allen Watson]

    I'm looking for a way to avoid a lot of typing. I have a large Contacts
database, with many groups such as "Family" and "Friends". I want to
create Postbox Address Books with the same contents as these groups, so
that I can use a filter such as "in Address Book Friends", because when
I am creating the filter for address book, it does not show any of the
Mac Contacts groups...just the entire Mac address book.

I do not seem to be able to drag and drop contacts from the Mac contacts
database into a Postbox Address Book. Import does not help, because
Contacts will not export in any of the file formats Import accepts.

Is there some way I can transfer contacts from the Mac Contacts app into
a Postbox Address book?