Mojave 10.14.4 fails to Authenticate Gmail account

Followed steps from Yana131. Mail appears to be working as lightning icons disappeared and mail coming in, but google calendar still has caution icon. Clicked on the caution icon, logged into google account, confirmation failed and still no connection for calendar.

I'm losing my mind! What worked last week no longer does and neither does any of the solutions suggested. I've spent a day on this so far, the gmail accounts suddenly work for a bit but I cannot send anything from either of my Gmail accounts. Endless loop of authentication. Any new ideas?

Thanks but it doesn't work for me. I'm now in an endless loop unable to get my Gmail account back into Mail, suppose it doesn't matter since it was causing more frustration than anything. This has a huge impact on my work email, I am stunned that with this many people having a problem there is not a fix that works!

Thank you! I followed these exact instructions and so far it's working. I think re-starting after deleting the internet accounts might have cleared out the issue. For those who haven't tried it yet...here's the link that mulberrywriter provided: https://deciphertools.com/blog/2018-01-03-mail-smtp-offline/

After trying several of the solutions and nothing working I contacted Apple Support. What worked was deleting all google keychain passwords and re-entering them when safari required the authentication. Keeping my fingers crossed that this holds longer than the last fix, which was less than a week. Frustrating and time consuming exercise!

Like you, I've found all the solutions fail soon enough after they seem to fix it. I've just deleted all my passwords in keychain...I use Dashlane anyway so it's no big deal. Cross fingers that this keeps us going till we get a fix from somewhere.

Spent FOUR HOURS on chat and phone with Apple today. The first three were bullshit from Apple where they wouldn't admit there was a problem, let alone that they had even heard about it. In which case a) their front-line CS personnel aren't properly trained, or b) they're lying. This isn't a good look for Apple. I pay thousands more for their products because I expect them to work, and for them to fix the problem if they don't. Amazon and Google are SO FAR AHEAD of Apple, which is tragic, because it used to be the reverse. With Apple's crumbling ecosystem (Amazon and Google crush them in home automation, gmail, online shipping, online original video content, and their hardware now becoming not worth the 3-5x asking price, I fear they are on the way out.

Anyway, after all this time, I got to someone who said, "Oh, yeah, that problem, let's try this fix." From there it took 10 minutes and things were resolved. You have to delete any keychain data that contains google or gmail, basically. Contact Apple and insist that you know there's a problem, send them this screenshot if they deny it. Their first-level CS support seems to be trained to obfuscate and deny. Immediately ask to be transferred to a supervisor.

Hi Ken, and when I do that "You have to delete any keychain data that contains google or gmail, basically" is that all and it will resolve this annoying bug? Or do I have to still call to Apple support after that because they need to do something in my account as well? Thank you.

I'm following your lead and want to fix this problem. Before I proceed with the keychain deletions, can you tell me what happens when I delete them?

Also, I'm in Rome, Italy and suffered through over an hour with Apple Assistance in Italy. They took the same position of ignorance of the problem. My assistance request number is 2000045928566. I contend Apple is Apple and at least here in Italy they are aware of the problem. Following the exhaustive dialogue, screenshot, etc., we closed the discussion because Apple needed to study for a solution. I was told to call back, citing my number above and ask for the status. I decided to start using Spark instead, I don't have time for these relentless, time-consuming chit-chats. Hope to hear from you.

Just got off the phone with first line Apple support. They now are aware of this problem and the fix appears to work. Unfortunately I did not record the instructions or write them down step by step. Basically the fix involves deleting google related id tokens and oath's in keychain, deleting the google account, restarting and re-adding the google account. Wish I could be more specific.

Best part was that I got a call back immediately and did not have to spend hours waiting. Hopefully they will put out an OS update soon to fix this problem.

Todd, honestly, I'm beginning to wonder why I wasting so much time trying to fix Mail. Spark is functional, easy to use, has everything that I need and has yet to fail in any respect. So far, the only thing that it doesn't offer is the possibility to change the font. Best to you from Roma.

Well, it appears now that I'm in the same boat as you. Every fix fails after a while and then doesn't work again. I'm so frustrated by the wasted time. I'll try this 1 more time with Apple support but after that I'm getting rid of Mail. I'm having simultaneous issues with iCloud sign-in, works fine and when Gmail accounts go to ****, usually iCloud goes along with it.

Thanks! I'm just on the phone with Apple (same as you, has been very fast response from them thankfully). I was given the same fix yesterday as you and it worked...until today! My accounts weren't working for the last 5 hours but now seem to have come back up again. I cannot send from them though, smtp server is off-line and try as I might I cannot get them back without ending in that same endless authentication loop. It sounds like I'll be passed onto someone more senior, just on hold right now.

This works for me !

Go to https://accounts.google.com/DisplayUnlockCaptcha to repair the access (documented on https://support.google.com/accounts/answer/2461835?hl=en)

after fixing add the account in the mac os settings or over the mail app as usually (you don't even need to delete it first if it's already added).

After verification in the opened safari window everything will go well.

This is the best I can reconstruct what the Apple tech instructed me to do. Refer to my post from yesterday. In Keychain, search "com.apple.account.google" under all items and then delete all results. Then delete your google account, restart, and then add the account back in. This has worked so far with a minor bug, as it appears that the email app lost connection to google when the computer slept overnight, but was able to reconnect when told to get mail.