Hello! So far my iMessage on MacMini has worked perfectly, but today I have tried to send a massage and the application wrote to me "Not Delivered" with a red exclamation mark. I saw the preferences Accounts and my Apple ID was Inactive. When I have tried to "Sign in", I was given this answer "Could not sign in to iMessage. An error occured during activation. Try again."
Please help me, how I can correct it.
Mac mini, macOS High Sierra (10.13.3)
Messages - If you can‘t sign in to your iMessage account or FaceTime on your Mac
Have someone else attempt to sign in using their Apple ID. If they can successfully sign in and use Messages/FaceTime, it may be your Apple ID.Someone I know had this happen and I was able to sign in usingmy Apple ID. After a call to Apple Support and then being elevated to a tier 2 support person, it turned out it was a problem with their Apple ID. It took the software engineers 3-4 days to fix the problem. When calling Apple, make sure you tell them it is an Apple ID problem so you don't get charged.
There is a contact link.
Apple Support by e-mail or chat Select your device, Battery, Power and Charging, then Power adapter not working to get a chat option.
Start to have a look here please: If you can't sign in to your iMessage account or FaceTime on your Mac - Apple Support and in case of further issue let us know 🙂
Why does not work my iMessage on macMini
