I'm using a MacBook Air early 2015 with macOS version 10.13.1. I've been using messages and FaceTime in my Mac but suddenly I'm unable to sign in with my Apple ID into messages and FaceTime.
MacBook Air (13-inch, Early 2015), OS X El Capitan (10.11.6)
Messages - Error Processing Registration
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.
Unable to sign in into messages and FaceTime on my Mac using my Apple ID
