Authentication Failed; Unable to add Google Account in macOS SONOMA

Aref Ha wrote:

I have a MacBook Pro M3 Pro with Sonoma 14.5.

When I try to add my Google account via "System Settings" or "Mail app" or "Calendar app" after going through two steps verification in a web browser, it says "Authentication Failed, failed to authenticate with Google, please try again later":

https://discussions.apple.com/content/attachment/05261c3f-18f3-4918-9e2d-2e5a156f8f071.

I tried many solutions:

Change the browser to Chrome, Edge & Firefox

2. Boot Mac into Safe Mode

3. Using app password in Google account

4. Removing Gmail & Google items from "Keychain Access"

5. Using VPN to change the location

6. Turning off the location service in Mac Setting

7. Unchecked the Privacy setting in Safari (remove Cross Site Tracking, Hide IP Address & ...)

8. Unchecked "Use advanced tracking and fingerprinting protection"

9. Tried to add account from "Mail" instead of "Setting"

10. Changed DNS of WiFi to Google ones

Tried every solution in 1. This Conversation Link

2. ...

None of them worked !!!

Anyone has a working solution? It is really annoying and disappointing.

What did google support say when you contacted them about their product, did you let them know it was annoying and disappointing?

Aref Ha wrote:

No. Actually I don't know to whom shall I write about. Any idea?

You contact gmail/google support.