Importing Contacts
You can import contacts into your Address Book that are in CSV format.
To import contacts:
Click on More… > Import Contacts on the Contacts list menu.

The Address Book Import dialog will open

Select your source file: Locate the source file on your computer.
Assign to: Select the family member these contacts belong to.
%(notice)Only Parents have rights to assign contacts to another Family Member.
Click on Import to begin the import process.
If the format is not recognized, you will be presented with an import preview.

Please review the results in the Preview window to make sure this mapping is correct.
Make any necessary changes by selecting a new field in the CSV field dropdown boxes. You may need to pick each field in the mapping form for files without headers.
When you are finished, click on Import to import the file into your Address Book.
