Hit the Return key after typing “/Library/Caches.”.Now select “Go to Folder” from the drop-down menu.Microsoft Teams won’t open on Mac: Troubleshooting tips In this blog, we’ll recommend the best methods to figure out the problem and fix it. It’s possible that the problem is with your Teams app. However, several people have complained that the Teams App on their MacBook has ceased operating it either stopped working all of a sudden or after an update to Mac OS. Teams works and runs successfully on most operating systems including Windows, Mac OS or even a browser. Microsoft Teams offers its users a collaborative platform to host meetings, conferences, events, and even institutional education.