Some macOS users are unable to sign into Gmail inside the Mail app after installing Apple’s most recent update.
The version 10.14.4 release, rolled out on Monday, puts many in an endless sign-in loop when trying to sync their Google accounts. The problem affects new accounts, as well as existing accounts that were already set up in Mail before the update arrived.
macOS 10.14.4 brought a number of nice new features to Mojave. Users can enjoy Apple News+, automatic Dark Mode switching in Safari, and more. But the update also introduces a new bug that is causing all kinds of frustration for Gmail users.
Mail bug leaves Gmail users out in the cold
“Google requires completing authentication in Safari,” reads the message many users are seeing when trying to access their Gmail accounts in Mail. They are prompted to open Safari and sign into their Google accounts, but the process cannot be completed.
Gmail sends users back to Mail, which presents users with the same popup and leaves them in an endless loop — bouncing between Mail and Safari.
The issue has been reported by a growing number of macOS users on the Apple Support forums. It does not affect third-party email apps on macOS, and there doesn’t appear to be a workaround for now. Toggling two-factor authentication does nothing.
Not all Gmail accounts are affected
“I’m having the same issue with my company’s G Suite account starting today, after updating to 10.14.4,” writes on user. “I am also having the same problem after updating to 10.14.4,” writes another.
Strangely, it seems not all Gmail accounts are affected. Even those who have experienced the issue say there are able to log in to other Gmail accounts; it is just certain ones that won’t work.
Apple is yet to acknowledge the problem so there’s no word on a fix for now. But if you rely on accessing your Gmail account in Mail, you might want to avoid macOS 10.14.4 for now. If you’ve already updated, you can access Gmail in another email client, or through Safari.