How do i set up my messages on my new MacBook Pro?

Question

how do i set up "messages" on my new macbookpro?

Answer 1

Hello Monique,
Thank you for the question.  It sounds like you are trying to set up iMessage on your MacBook Pro.  You can sign into iMessage using the steps below:
iMessage uses Apple ID accounts. Take note of your Apple ID and password. Apple ID accounts are used for purchasing content in iTunes, App Store, and so forth. Read this article for more information about Apple ID.
Use any of these methods to add an iMessages account to Messages when:
Setting up your Mac or user account for the first timeWhen you set up your Mac or a new OS X user account, enter your Apple ID and password to automatically add Messages to your iMessages account.
Using Messages for the first timeWhen you open Messages for the first time, you should see the iMessages Setup sheet to sign in.
Messages is already set up to use an iMessage account:
Choose Messages > Preferences… > Accounts (toolbar)
Click iMessages in the Accounts tab on the left.
Enter your Apple ID and password or click "Create Apple ID…" and follow the onscreen instructions.
You can find the full article here:
Mac Basics: Messages
http://support.apple.com/kb/HT5395
I recommend signing into iMessage with the same Apple ID you use for iMessage on your other devices.  If you have an iOS device, you can check what Apple ID is being used by going to Settings > Messages > Send & Receive.  If you don't use an iOS device, you can use the same Apple ID you use for iCloud or iTunes. 
iPhone User Guide - Messages settings
http://help.apple.com/iphone/7/#/iphf2d853e3
If you are still not receiving messages sent by your friend after setting iMessage up on your MacBook Pro, I suggest reviewing the following article:
Messages (Mountain Lion): Fix iMessage issues
http://support.apple.com/kb/PH12065
Thank you for using Apple Support Communities.
Best,
Sheila M.