If you keep receiving the error message Unable to establish secure connection to Zoom, follow these steps to troubleshoot the issue. 

This is a known error currently affecting some macOS users.

This article covers:

• How to troubleshoot Zoom error message "Unable to establish secure connection to Zoom"
  • Uninstall the Zoom app
  • Delete the existing calendar and contact integration setting
  • Uninstall Zoom, reconfigure calendar and contacts integration, and restart computer
  • Update to the latest version of Zoom
  • General troubleshooting

How to troubleshoot Zoom error message "Unable to establish secure connection to Zoom"

Uninstall the Zoom app

Completely uninstall the Zoom app to remove the app cache:

1. Open the Zoom desktop application.
2. Select zoom.us at the top of your screen and select Uninstall Zoom.
   
3. Select OK to confirm uninstalling the Zoom desktop application and all of its components.
   
4. Restart your Mac.
5. Once completed, reinstall Zoom on our download center.

Delete the existing calendar and contact integration setting

1. Sign in to the Zoom web portal.
2. In the navigation menu, click Profile.
3. Under Others, in the Calendar and Contact Integration section, find the existing integration.
4. To the right of the existing calendar and contact integration, click Delete.
5. If a verification dialog displays, click Delete to confirm.
6. Reconfigure the calendar and contact integration.

Uninstall Zoom, reconfigure calendar and contacts integration, and restart computer

You can try both methods of uninstalling the Zoom app and deleting your current calendar and contacts integration setting. Ensure that you reboot your computer.

1. Uninstall the Zoom app.
2. Delete the existing calendar and contact integration setting.
3. Restart your computer.
4. Once completed:
   • Reinstall Zoom on our download center.
   • Reconfigure the calendar and contact integration per your company's standard.

Update to the latest version of Zoom

Zoom regularly provides new versions of the Zoom desktop client and mobile app to release new features and fix bugs. We recommend updating to the latest version when it is available to receive the best video and audio experience.

You can check which version you're currently running for video conferencing, as well as follow our release notes to stay updated on the latest changes from Zoom.

Learn more about updating Zoom to the latest version.

General troubleshooting

If you are still having issues, check and install any system update on your Mac. Then, restart your device and see if it resolves the issue.