An addressbooklocks file extension is related to the Mac OS X (macOS) Address Book files.
Software that open addressbooklocks file
ADDRESSBOOKLOCKS file extension - Mac OS X (macOS) Address Book data
What is addressbooklocks file? How to open addressbooklocks files?
File type specification:
The addressbooklocks file extension is associated with the Address Book, a contacts management tool included in Apple Mac OS X (macOS) operating system.
The addressbooklocks file stores some kind of data used by Mac OS X (macOS) Address Book.
The default software associated to open addressbooklocks file:
Address Book (Contacts) for Mac 
Company or developer:
Apple, Inc.
The Address Book (Contacts) is a little handy application with loads of features that are often overlooked by most users. Its very useful for for organizing your contacts, but Address Book's real power is that it works with many other applications. Its an integral part of Mac OS X (macOS) operation system. From Mac OS X Mountain Lion the Address Book will be renamed to Contacts.
List of recommended software applications associated to the .addressbooklocks file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open addressbooklocks file, edit addressbooklocks file, convert addressbooklocks file, view addressbooklocks file, play addressbooklocks file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with addressbooklocks file - Mac OS X (macOS) Address Book data
Click on the software link for more information about Address Book (Contacts) for Mac. Address Book (Contacts) for Mac uses addressbooklocks file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
