can't update imessage with apple id

Hello shoshanni,

Thanks for choosing the Apple Support Communities. We see you're unable to sign in to iMessage on your Mac. Let's see if the steps below will help you troubleshoot and resolve the issue.

If you can't sign in to your iMessage account or FaceTime on your Mac - Apple Support

"Check your internet connection

Make sure that your Mac is connected to the internet. You should be able to load web pages or receive email, for example.

Connect to the internet with your Mac

Check for a service outage

Check for any temporary service outages affecting iMessage or FaceTime.

Apple System Status

Check your Date & Time settings

Make sure that the date, time, and time zone are correct.

Set the date and time on your Mac

Make sure that your software is up to date

Software updates can improve the stability, compatibility, and security of your Mac, and might also resolve the issue.

Update macOS on your Mac

Check your Apple ID

To make sure that your Apple ID and password are correct, go to the Apple ID account page and sign in with the same Apple ID that you're using with Messages and FaceTime. If you're able to sign in, open the app and take these steps:

• Messages: Choose Messages > Settings (or Preferences), then click Sign Out. Sign in again with the same Apple ID you used on the Apple ID account page.
• FaceTime: Choose FaceTime > Settings (or Preferences), then click Sign Out. Sign in again with the same Apple ID you used on the Apple ID account page.

Reset NVRAM

In case the issue is related to any of the settings stored in NVRAM:

Reset NVRAM on your Mac

Check for third-party software

If you installed firewall, security, VPN, or other third-party networking software, make sure that the software isn't blocking any of the network ports used by iMessage and FaceTime. If necessary, disable the software and then try using your iMessage account or FaceTime again.

Check VPN (Virtual Private Network) and third-party software to help resolve network connectivity issues"

We hope this helps.

Cheers!