Unable to login

contact Apple ID Support. Based on multiple posts I have read, they may not be willing to help. See the Apple Support articles below for contact information.  

Apple ID - Official Apple Support.    

Contact Apple for help with Apple ID account security - Apple Support.   (Link doesn’t always load)  

Get Support          Work through the screens to get a chat option. 

Apple Support schedule phone call

https://twitter.com/AppleSupport.          People have posted it may take an hour or more to get a response.

From the Apple Support article below. 

Without proof of your identity via security questions and other carefully selected criteria, Apple Support can't help you reset a password or perform any other actions on your account. These policies are audited and reviewed on a regular basis.

Security and your Apple ID - Apple Support.      

Which above one? To have it be like a new computer, do a backup, preferable 2 separate ones on 2 drives. Boot to the Recovery Volume (command - R on a restart). Run Disk Utility/First Aid. Reformat the drive using Disk Utility/Erase. Use Mac OS Extended (Journaled), then click the Option button, and select GUID. Quit Disk Utility, then re-install the OS.

Reinstall from macOS Recovery

OS X Recovery

When you reboot, use Setup Assistant to restore your data.

What are you doing specifically when this happen? Message received?

Device or computer?

You are welcome. Good luck.

Device or computer?

If a device

Passcode - If you forgot the passcode for your iPhone or your device is disabled.      

Passcode - If you forgot the passcode for your iPad or your device is disabled.     

Passcode - If you forgot the passcode for your iPod Touch or your device is disabled.

If a computer

User Password Reset.   

User Password Reset (2).         

User Password Reset – Apple ID.