AddressBook Aid2 is an application for directly editing the address book created by the macOS standard application "Contacts".
This app has rich editing functions not found in the "Contacts" app.
Search and replace, string manipulation and batch conversion of selected items, side-by-side comparison of contacts, most operations can be undone and redone.
Various edits can be performed, such as changing the searched character strings all at once, and eliminating duplicates in the address book.
And this application doesn't communicate with outside servers using the Internet. The Contacts data is only used inside of the app and never be sent to any servers.