Hello and welcome to Apple Support Communities, Hoang_L3.
If I understand your post correctly, you're trying to use Messages on your Mac. I'd like to help.
Try the steps in this article:
Use Messages with your Mac
If that doesn’t fully resolve the issue for you, do you mind letting us know what type of error you're seeing?
Thanks for using the Apple Support Communities. Take care.
2 replies
Messages does not work.