"error 400: invalid_request" in MacMail using my Gmail account

Hi there,

For years I have been using my gmail account through mac mail, contacts and iCal. This week it stopped working giving me the error 400: invalid_request. You can't sign to this app because it doesn't comply with Google's OAuth policy for keeping apps secure.

I have multiple email accounts running through mac mail and its very difficult to jump to web based email for one account

Does anyone have suggestions to get this working again please?

Many thanks in advance!

[Re-Titled by Moderator]

MacBook Pro 15″, macOS 10.12

Posted on Mar 2, 2023 8:08 PM

Top-ranking reply

Douglas Thom

Level 1

9 points

Posted on Mar 21, 2023 3:13 PM

This answer is almost useless, since many computer's cannot be upgraded to the current macOS that support the security requirements for Gmail. You probably need macOS Mojave or newer (with updated Mail).

Unfortunately you will need to use Safari or other browser to log into Gmail directly on older machines.

Date: 21 Mar 23

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"error 400: invalid_request" in MacMail using my Gmail account

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