Auth 2.0 Error 400 on Mail account

I understand you want to add a Google account to the Mail app. To do that follow these instructions from the Mail User Guide: Add email accounts in Mail on Mac - Apple Support. Select your macOS version from the dropdown menu at the top of that page. To find out the macOS version your Mac is using please read Find out which macOS your Mac is using - Apple Support.

If you continue to get the error then contact Google for assistance: Contact a third-party vendor - Apple Support.

To add to previous posting

Link below outlines some changes in Google regarding using Non Native Android Apps to access Google e-mail Services

The Application Specific Password factor was introduced not only in Google e-mail but also similar in Apple

Sign in to apps with your Apple ID using app-specific passwords - Apple Support

https://support.google.com/mail/answer/185833?hl=en-GB

This is so frustrating. I am using a MacBook Air 2015 and cannot install gmail onto the mail app. What is the resolution to this? This has never happened and now I cannot get my emails on my laptop... I know the various route for installing email this is not the problem.....

same here, cant add a google account in apple mail with hight sierra, any ideas?

As Google states it is their requirement, and their decision to impose it upon others.

If a product or service becomes too difficult or inconvenient to use don't use it. It seems Google wants to force you into using something else.

I don't understand what's so great about Google anyway. The product they sell is you. The emails you send are theirs. What are you getting out of that deal?

Is that so?

Then put and .. . . and vent to the E-mail Severs of the Users' Choice.

We hear similar complaints directed towards Apple for imposing things on Users in the iOS / macOS they do not like.

Don't like Google, Don't Apple.

Maybe some other platform would be a better fit.

Has the user tried Linux - Oh don't them either 😔

We all like our Soap Box from time to time

You are welcome for the free technical advise as it relates to Apple Computers, Service and Software.

There has been sufficient advise offered, from more than one Contributor, for the User ( you ) to make an informed and educated choice what the next course of action is required for this computer.

The suggestions have been put forth on a volunteer basis, in good faith and in the best interests of the computer.

All advice given here does not solve the problem unfortunately. What is the solution?

https://support.google.com/mail/answer/185833?hl=en-GB