I’m running OSX 10.12.6 and Mail won’t let me use my Gmail account anymore. 400 error thing. Google won’t let Mail set up my account. Just gives me an error.
It’s there a workaround for this common problem anyone knows about?
Upgrade, yes. No. Cant.
I’m not outlining the whole issue because if you had this happen, you know.
The common solution on Google with the App password selection doesn’t show up as an option anymore when I use a browser to log on.
Get Mimestream. I’ve used it with Gmail for years. It’s not an email client. It’s a gmail client. It’s absolutely first-rate. A true Mac app, in terms of attention to detail.
I’ve needed to help a few clients with this problem. Google recently started enforcing oAuth 2.0 for their accounts. I could be wrong, but I remember reading that OS X Sierra and High Sierra don’t support oAuth 2.0, so you can’t use Apple Mail unfortunately without upgrading.
Have you considered using an alternative?
Edit: I stand corrected. App Passwords are a thing.