The Mattermost desktop client is available for installation through your Managed Software Center app.
Search for Mattermost in your Managed Software Center and click the Install button.
After the Mattermost app finishes installing, open the app by searching for Mattermost in the Launchpad app on your dock, or by pressing Command + Spacebar to open your Mac’s Spotlight search feature.
The first time you open the app you will be prompted to sign in via our SSO Service with your @company.com email address and the password you use to log in to your laptop.
Add Mattermost to the “Login Items” list of applications launched on MacOS login.
From here, follow the instructions in the Channels and Notifications setup section to join and create channels.