Cannot add Google Account to MacOS Mojave

I restored my authentication functions by signing out iCloud:

1. System Preferences - iCloud - Sign Out.
2. Restart Mac.
3. Login iCloud again.

After that, somehow, mail accounts (office365, google, iCloud) stopped asking for credential again.

(If you want to try it, backup everything related to iCloud at your own risk).

The issue seems resolved on Mojave with the release of Safari 13.0.1. Make sure to restart your Mac after updating Safari.

I am not running MacOS Mojave yet but experience gMail log-in issue after upgrading to Safari 13. On screen a dialogue box told me to disable cookie, after a few trial & error I gain access by going to Safari preference, then the tab Websites and turn off Content Blockers related to "account.google.com". Now try adding the account again via System Preference to see if it will work. If it does, then Safari 13 could be the one that broke the "link" not Mojave. Hope this helps.

FWIW, You can restore your Mac with Time Machine from the time before you installed Safari 13.0.

FWIW, Safari 13 for Mojave is broken. Until it's resolved, you'll have to use webmail or a different email client.

Wooyunlong wrote:

Fix safari13, please...

This is a users forum so we can't fix it. I would suggest sending Apple a bug report. Feedback - Safari - Apple

robefran wrote:

This did not work for me. It would not replace Safari 13.0

You have to completely restore the Mac. Not just Safari.

Someone seems to have a solution over at Google support forum, here's the link for you folks to check it out.

https://support.google.com/mail/thread/14841442?hl=en

Same here. Both personal and business email accounts now borked on the Mac using Mail.

It all started when I changed some weak passwords (2FA only goes so far...), and the accounts prompting for "Google requires completing authentication in Safari.". Click on "Open Safari" and...nothing. And yes, I have just upgraded to Safari 13.0...

Come on Apple/Google - you're usually better than this.

Same error here. This issue is not limited to Google. After upgrading to safari13, my office 365 and iCloud (.......) authentications are also not working in mail app... For Gmail and Office365, mail app keeps asking me to Open Safari to enter password, yet Safari won't pop up any box for any password when I open it. iCloud account does pop up a window for me to input password, but when entered, it keeps telling me "unknown error occurred".

Fix safari13, please...

I am having the same issue. Did you by any chance upgrade to Safari 13.0? I think this is where the issue may be coming from.

I too have the same problem as above on my 2019 MacBook Pro (MacOS Mojave 10.14.6 with Safari 13.0). Any advice would be appreciated.

Same here. Happened when I updated to Safari 13.

This did not work for me. It would not replace Safari 13.0