How to open Apple Address Book contacts archive .abbu files
Have you had trouble opening the abbu file on your computer? What are abbu files? We explain what they are and recommend software that we know will open them.
What is abbu file?
Files with abbu extension can be often on macOS / Mac OS X as address book archives for Apple Address Book (Contacts).
Apple Address Book contacts archive description
File extension abbu is best know for its use in Apple Address Book application used to manage addresses and other contacts information.
The .abbu file contains archived contact information exported from the Address Book database. From Mac OS X Mountain Lion The Address Book is renamed to Contacts.
Suggested software to open abbu file

Address Book (Contacts) for Mac
Contact management tool for macOS

Mac OS X
Unix-based operating system for Apple Mac computers

macOS
A Unix-based desktop operating system for Apple Mac computers