I do not have messages on my macbook pro

you are running mountain lion 10.8 or higher? It used to be called "iMessage".

Hi Shldr2thewheel,

The app has never been called iMessages.

iMessages is just an Account you can register on an iPhone or the Mac version of Messages.

Messages appears, in place of iChat, in Mountain Lion with a major interface change and the inclusion of the iMessage account.

10:18 pm Thursday; December 19, 2013

 iMac 2.5Ghz 5i 2011 (Mavericks 10.9)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
 Couple of iPhones and an iPad

I have an old macbook pro and every time I go to sign into messages with my apple id it always says this, "Could not sign in. Please check your network connection and try again." What can I do so that it will allow me to sign in. I know I do not have an issues with my network. Please help me.

Hi,

Start here FaceTime, Game Center, Messages: Troubleshooting sign in issues - Apple Support

8:02 pm Monday; February 9, 2015

Hello, Messages is still not working on my computer…. States that my network connection is still not working but everything else but FaceTime and Messages are working.

Thank you

Hi,

If you have one in System Preferences > Users and Groups log in to another Mac User account and (Or create a Test account specifically) set up Messages there with at least the iMessages account.

Does it work in this Mac User account ?

9:36 pm Monday; February 9, 2015

Hello,

Tried that already and it still doesn’t work.

Thank you.

I have the new Yosemite not Mountain Lion, does that make a difference?

Hi,

Not for some errors.

IF the iMessages login does not work in Any Mac user account then try this.

In the Apple Icon Menu > About this Mac is the Serial Number showing ?

This panel is different in Yosemite and you don't have to click the current OS level line twice.

If the serial number is Missing then you will have to visit an Apple Store with the computer to have them put it back.

10:02 pm Monday; February 9, 2015

Hello,

The serial number IS showing.

Hi,

In System Preferences is the Date and time Set including the Automatic Server and Time Zone ?

Also in the Network pane > Advanced Button > DNS tab dos it show IP Addresses that are not your Router (See the TCP/IP tab) ?

6:58 pm Tuesday; February 10, 2015

Just thought I would let you know that it is working now.

Thank you so much!! I appreciate you taking so much time out of your schedule to help me!!!

Understood.

Thanks for lettings us know.

7:17 pm Wednesday; February 11, 2015