Desktops
Q: imessage an error occurred during authentication
Since upgrade 10.11.6 can not use imessage and get notice
an error occurred during authentication."
what now?
Apple Watch, iOS 9.2.1
Posted on Jul 20, 2016 7:56 AM
by gail from maine,Apple recommended
iCloud
Are you using Two-Step Verification or Two-Step Authentication for your Apple ID? If so, you need to use an App-Specific password to sign into FaceTime and Messages:
Using app-specific passwords - Apple Support
Cheers,
GB
Posted on Jul 20, 2016 12:14 PM