How to I add my contacts into messenger?

Hello Edmund,

Thank you for the question. If you are using the iMessage service in the Messages application, you can add the recipients Apple ID in the Contacts application to message them. After that, you can just type in their name or Apple ID when starting a new message:

Conversations

To start a conversation, just start typing in the name or Apple ID of the person you would like to have a conversation with.

Note: To correlate a name to an Apple ID, create a card in Contacts with the person's name and Apple ID.

You can find more information about using iMessage here:

Mac Basics: Messages

http://support.apple.com/kb/HT5395

Alternatively, if you are using AIM, Jabber, Google Talk, or Yahoo! in Messages, you can add buddies to your buddy list:

Add buddies

If you’re already having a conversation with someone using AIM, Jabber, Google Talk, or Yahoo!, select the conversation, then choose Buddies > Add Buddy. Otherwise, do the following:

1. In the buddy list window, click Add (+), then choose Add Buddy.
2. If you’re using a single buddy list, choose the account you want to use to chat with the buddy from the “Add to” pop-up menu.
3. If the person you want to add has a compatible messaging account listed in Contacts, click the disclosure triangle next to the “Last name” field, choose his or her name from the list, then click Add. Otherwise, complete the remaining steps.
4. Enter your buddy’s buddy name in the “Account name” field, and your buddy’s first and last name in the “First name” and “Last name” fields.
5. Choose a group for this buddy from the “Add to group” pop-up menu. If you don’t want to add the buddy to a specific group, choose Buddies.
6. Click Add.

You can find these steps and more info in the following article:

Messages (Mavericks): Use buddy lists

http://support.apple.com/kb/PH15057

Thank you for using Apple Support Communities.

Best,

Sheila M.