Change Users & Groups Group preferences on Mac
To change these preferences, choose Apple menu > System Preferences, click Users & Groups, then select a group on the left.
Note: If the lock at the bottom left of the pane is locked , click it to unlock the preference pane.
Change the group’s name.
Select the users and other groups you want to make members of the group.
Add and Remove
To add a new user or group, click the Add button on the left, then enter the information for the new user or group. To delete a user or group, select it in the list, then click the Remove button on the left. See Delete a user or group.
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 in to your Mac directly instead of connecting to your Mac for file sharing. See Change permissions for files, folders, or disks.