Airport Express and Time Capsule don't recognise Apple ID any more

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Airport Express and Time Capsule don't recognise Apple ID any more

Suddenly, my Airport Express and Time Capsule devices no longer can be authenticated by my Apple ID. No change of passwords or AppleID, but I can no longer use the Time Capsule for Time Machine back-ups. Strangely, the Time Capsule's WiFi network kept working, and the Airport Expresses still received audio from my MacBook Pro, which runs the latest MacOS, Mohave 10.14.3.

Both Airport Expresses are good for audio, despite flashing yellow light and the message on Airport Utility that they both have "Unrecognised Apple ID or password".

I then told Airport Utility to forget the Time Capsule, and now it can't be found as "Other WiFi Device". However, as Time Capsule WiFi Network, it reappears in Airport Utility, and works fine connecting to the internet via my modem. But not to back up!

What's going on???

Posted on Feb 14, 2019 6:19 PM

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Answer 1

Top-ranking reply

Bob Timmons

Level 10

185,462 points

Feb 14, 2019 8:23 PM in response to John Nightingale

What's going on???

What is going on is that you must have missed the information from Apple that Mojave has dropped support for Back to My Mac, so the BtMM settings in AirPort Utility that require your Apple ID and password are all messed up.

More info here: Prepare for changes to Back to My Mac - Apple Supporthttps://support.apple.com/en-us/HT208922

You will need to delete the BtMM settings in AirPort Utility for the Time Capsule and AirPort Express and then Update the application to save the changes. Then, restart all of your network devices.

Deleting the Back to My Mac settings for the Time Capsule and AirPort Express in AirPort Utility will solve the "Unrecognized Apple ID or password" error message problem but it may or may not solve the Time Machine backup issue.

Post back if backups are still having difficulty after you have fixed the Back to My Mac problem.

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Answer 2

Feb 15, 2019 12:11 AM in response to Bob Timmons

Yep, I got rid of BtMM and now they are all glowing green. But, Time Machine now needs to do a complete back up using the same disk as before. Strange behaviour, but I guess that's computers

Thanks, Bob!

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Answer 3

Bob Timmons

Level 10

185,462 points

Feb 15, 2019 3:04 AM in response to John Nightingale

Do you recall seeing a message like the one below? If yes, your backups were corrupted, so Time Machine had to erase the old backups and start over again with a new backup.

The new Mojave update may or may not have been the cause of the Time Machine issue(s).

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Airport Express and Time Capsule don't recognise Apple ID any more

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