- Update MacOS and Teams client: It's possible that your current MacOS version is too old and no longer supports the version of Teams you're trying to run. If your MacOS is out of date, you should update it. It might also be helpful to update your Teams client to the latest version if you haven't already. However, if you're on vacation and you don't have a good Internet connection, this might be a bit difficult to do.
- Web Version: If you are unable to get the desktop client working, you can use the web version of Teams. To use Teams on the web, open a web browser and go to https://teams.microsoft.com/. Sign in using your Microsoft credentials. It should work on most modern web browsers.
- Using another device: If you have access to a smartphone or a different computer, you can install and use the Teams client on that device.
Contacting Microsoft Support: If none of the above solutions work, you may want to reach out to Microsoft Support. They can provide more targeted assistance based on the specifics of your situation.