I recently started using on my MacBook Pro running macOS High Sierra 10.13.6 with Safari Version 11.1.2 (13605.3.8). I have both the macOS app from the and the Safari extension for the app installed from. I have been looking forward to give 1Password a try for a very long while (which I finally did). I am quite satisfied with the feature set and simplicity of the product. However, I updated to the latest macOS client released on the Mac App Store today, which broke the Safari Extension for me. The screenshot below shows the release notes.

Now, when clicking on the Safari extension button on the toolbar, with a website open (which is already added in the 1Password database), does the following instead of offering to fill the password: • Nothing happens for a few seconds. • Following alert is shown by Safari. • Irrespective of whether I click Allow or ignore the alert and wait, this error is shown.

The 1Password macOS app doesn't launch. Even clicking on Try Again does nothing.

For example, macOS Sierra 10.12.4 (while the newest Sierra version is 10.12.6); or macOS High Sierra 10.13.3 (while the newest High Sierra version is 10.13.6). How to Fix: Update your Mac to the newest version first, then proceed to install macOS Mojave.

The thing is, that, this setup was working flawlessly until I updated the macOS client. What could have possibly gone wrong? I have not attempted any major salvage operations, as this is the first time I have setup 1Password app on my Mac. I am thinking about doing a fresh install of the app and checking if the issue persists (thereby concluding that this is a bug in the app release). I have already clicked on the link mentioned with the error message, and have reinstalled the extension, following by restarting the browser followed by restarting the Mac, but to no avail.

I have not taken any other steps on my own and though of seeking advice from experienced 1Password users. (I have been using the app for a couple days. I am currently under 1-month free trial with a high level of satisfaction and intend to convert to paid plan at the end of trial period expiry.) Salvage Update: It is observed that that the mini app which is resident in the Menu Bar is no longer recognizing the browser extension and asking to install it. Clicking on the install browser extension button directs to the Agilebits Safari Extension Galley web-page which acknowledges the extension installation. Removing and re-installing the extension has no effect. This issue is all over the today. Agilebits released 1Password for Mac v7.1.1 to address this issue.

Go back to the Mac App Store and download the update. If it's not available on the App Store yet (review process delay), try downloading direct from. *Edit: Posted on their forum from 1Password support: A build flag got set improperly / prematurely which caused WebSockets (which Safari relies on) to be turned off for the 7.1 build. We disabled that flag for 7.1.1. Safari is the only browser which currently uses WebSockets, the rest use Native Messaging. We are working toward moving away from WebSockets for Safari and toward Apple’s Safari App Extension framework.

I’ve had great luck with the or to point me to the document that addresses my situation (or yours in this case), but the first thing I would try is to be sure the mini version is working in your menu bar. There are diagnostics and until the mini version is running - no extension can operate. • Once you’ve verified that the mini version of the app runs when the main app is closed • Next try a different browser to narrow down if this is Safari only or all browser extensions. • You can also reduce the error chances by running the main app and the mini app and then relaunching your browser. You have a super detailed question and this answer is more about how to triage so please make a new answer once you get the proper solution. This can stand on how to triage and maybe not actually fix if this ends up being Safari version specific.