diff --git a/doc/misc/eudc.texi b/doc/misc/eudc.texi
index 66867cbc58..0cea3126a0 100644
--- a/doc/misc/eudc.texi
+++ b/doc/misc/eudc.texi
@@ -85,6 +85,8 @@ LDAP, Lightweight Directory Access Protocol
 CCSO PH/QI
 @item
 BBDB, Big Brother's Insidious Database
+@item
+macOS Contacts
 @end itemize
 
 The main features of the EUDC interface are:
@@ -110,6 +112,7 @@ Interface to BBDB to let you insert server records into your own BBDB database
 * LDAP::                        What is LDAP ?
 * CCSO PH/QI::                  What is CCSO, PH, QI ?
 * BBDB::                        What is BBDB ?
+* macOS Contacts::              What is macOS Contacts ?
 @end menu
 
 
@@ -186,6 +189,31 @@ performing queries on multiple servers.
 EUDC also offers a means to insert results from directory queries into
 your own local BBDB (@pxref{Creating BBDB Records})
 
+
+@node macOS Contacts
+@section macOS Contacts
+
+@url{https://support.apple.com/guide/contacts/welcome/mac,, macOS
+Contacts} is the rolodex-like application that ships with the macOS
+operating system@footnote{Apple have changed the names of their
+operating system and some applications over time.  macOS used to be
+called Mac OS X in the past, and the Contacts application was
+previously called Address Book.}.  It is tightly integrated with the
+other Apple applications (Mail, Calendar, etc.), and can synchronise
+contacts information between Apple devices via CardDAV servers (such
+as e.g. iCloud).
+
+EUDC considers macOS Contacts as a directory server back end just like
+LDAP or PH/QI servers, though the macOS Contacts application always
+resides locally on your machine.  The point in this is not to offer an
+alternate way to query your macOS Contacts database (the macOS
+Contacts application itself provides much more flexible ways to do
+that), but rather to offer an interface to your local directory that
+is consistent with the interface to external directories (LDAP,
+PH/QI).  This is particularly interesting when performing queries on
+multiple servers.
+
+
 @node Installation
 @chapter Installation
 
@@ -214,6 +242,7 @@ email composition buffers (@pxref{Inline Query Expansion})
 
 @menu
 * LDAP Configuration::           EUDC needs external support for LDAP
+* macOS Contacts Configuration:: Enable the macOS Contacts backend
 @end menu
 
 @node LDAP Configuration
@@ -339,6 +368,42 @@ and the @file{.emacs} expressions become:
 (customize-set-variable 'ldap-host-parameters-alist '(("" auth-source t)))
 @end lisp
 
+
+@node macOS Contacts Configuration
+@section macOS Contacts Configuration
+
+macOS Contacts support is added by means of @file{eudcb-mab.el}, or
+@file{eudcb-macos-contacts.el} which are part of Emacs.
+
+@file{eudcb-mab.el} reverse engineers the format of the database file
+used by the macOS Contacts app, and accesses its contents directly.
+While this may promise some performance advantages, it comes at the
+cost of using an undocumented interface.  Hence, users of
+@file{eudcb-mab.el} are recommended to double check the compatibility
+of @file{eudcb-mab.el} before upgrading to a new version of macOS.
+@file{eudcb-mab.el} is retained for backwards compatibility with
+existing configurations, and may be removed in a future release.
+
+@file{eudcb-macos-contacts.el} uses the public scripting interfaces
+offered by the Contacts app via the macOS
+@url{https://developer.apple.com/library/archive/documentation/AppleScript/Conceptual/AppleScriptX/Concepts/osa.html,,
+Open Scripting Architecture (OSA)}.  To accomplish this,
+@file{eudcb-macos-contacts.el} uses an external command line utility
+named
+@url{https://developer.apple.com/library/archive/documentation/OpenSource/Conceptual/ShellScripting/AdvancedTechniques/AdvancedTechniques.html#//apple_ref/doc/uid/TP40004268-TP40003521-SW44,,
+osascript}, which is included with all macOS versions since 10.0
+(which was released 2001).  @file{eudcb-macos-contacts.el} is hence
+recommended for all new configurations.
+
+To enable a macOS Contacts backend, first `require' the respective
+library to load it, and then set the `eudc-server' to localhost in
+your init file:
+@lisp
+(require 'eudcb-macos-contacts)
+(eudc-macos-contacts-set-server "localhost")
+@end lisp
+
+
 @node Usage
 @chapter Usage