Using Microsoft Teams on macOS, including installation, features, and compatibility
What is the OS version of your MacBook Pro? Is the New Teams application supported on this OS?
https://learn.microsoft.com/en-us/microsoftteams/teams-client-system-requirements
If the new Teams application is supported on your Mac computer, then you can install this application from the official installer site:
https://www.microsoft.com/en-us/microsoft-teams/download-app
Alternative, you can use Teams online in your browser: