Change How Contacts Sorts and Displays Names on Mac
The Contacts app for Mac defaults to sorting names by last name, and to showing the first name before the last name when browsing through the address book list of contacts.
With some minor adjustments, you can change how the Contacts app displays and sorts the address book contact names in Mac OS. You can also choose to change how names display, without changing how names sort, which may be the more useful settings choice for some.