Change Group settings on Mac
To change these settings, choose Apple menu > System Settings, click Users & Groups in the sidebar, then click the Info button next to a group on the right. (You may need to scroll down.)
You may need to enter your password to change group settings.
Change the group’s name.
Add users to a group. Turn off a user in the list to exclude them as a member.
Add groups to the list of group members. Turn off a group in the list to exclude it as a member.
Delete a group. (You may need to enter an administrator password.) See Delete a user or group.
You can control a group’s access to your shared folders by setting access permissions in File Sharing. See Set up file sharing.
You can also set group access permissions for folders and files inside your shared folders or elsewhere on your Mac. These access permissions also apply to users who log into your Mac directly instead of connecting to your Mac for file sharing. See Change permissions for files, folders or disks.