Change Users & Groups Group preferences on Mac
To change these preferences, choose Apple menu > System Preferences, click Users & Groups , then select a group in the list on the left.
Note: If the lock at the bottom left is locked , click it to unlock the preference pane.
Change the group’s name.
Add users to a group or add groups to a group list. Unselect a user or group in the list to exclude them as a member.
Add and Remove
Add and remove groups.
You can control a group’s access to your shared folders by setting access permissions in the File Sharing section of Sharing preferences. 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.