Using Gmail on Mail for years and suddenly this happened

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CH50 Author

Level 1

4 points

Using Gmail on Mail for years and suddenly this happened

What does this mean: Authorization Error

Error 400: invalid_request

You can't sign in to this app because it doesn't comply with Google's OAuth 2.0 policy for keeping apps secure.

You can let the app developer know that this app doesn't comply with one or more Google validation rules.

MacBook Pro 13″, macOS 10.13

Posted on Apr 12, 2024 4:00 PM

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Answer 1

Top-ranking reply

6x6

Level 7

22,589 points

Apr 12, 2024 5:16 PM in response to CH50

Google has strengthened its security and older Mac operating systems (OS X or macOS) are no longer compatible. This is why you are receiving this “Error 400.”

To connect your Gmail account on your Mac:

First, delete the Gmail account from your Mac if it still exists.
Then, you will have to create an application password: https://support.google.com/accounts/answer/185833?.
Finally, by adding the Gmail account in Mail on your Mac, choose "Other" and not "Google". Fill in your email address and application password.

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Using Gmail on Mail for years and suddenly this happened

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