Problem:  When using Outlook on a Mac the "New Contact List" option is greyed out 

Resolution:

Open Outlook 

Select Outlook, Preferences, and the General tab

Uncheck the option titled "Hide On My Computer folders"

Close tabs and return to email.  You will now notice the "New Contact List" option is available

To add a new contact list your email address must be selected in the column to the left

Create a List Title and Add new members

Your contact list will be shown in the Smart Folders group

To email the Contact List select the list from the Uploaded Contacts in Smart Folders and then select Email at the top

or Create a new email message in Outlook and select the Contact List name in the send to field.