Contacts (El Capitan): Select addresses for group members
If members of a group in Contacts have multiple addresses or phone numbers, you can select which address or number to use when sending email to that group or when printing contact information.
Choose Edit > Edit Distribution List.
Select the group.
Click the rightmost column heading to choose the information to manage: email (address), phone (number), or (street) address.
Select an address or number for each member.