Change Users & Groups Sharing Only User preferences on Mac
On your Mac, use Users & Groups System Preferences to create “sharing-only” users to share files and folders with others on your network. You can limit access to your shared information and computer. Sharing-only users can access shared files remotely, but can’t log in or change settings on the computer.
To change these preferences, choose Apple menu > System Preferences, click Users & Groups , then select a sharing-only user in the list on the left.
Note: If the lock at the bottom left of the pane is locked , click it to unlock the preference pane.
Sharing-only user picture
Choose a user picture that represents the user. You can change the picture that appears next to your user name or another user’s name in the login window on your Mac. You can choose a photo from your photo library, take a new photo using the camera on your Mac, choose a Memoji or emoji, use initials in a monogram, and more. When you choose a picture or other image for your user login picture, the selected image is also displayed for your Apple ID picture and for your My Card in Contacts. See Change a user’s login picture.
Change the sharing-only user’s password and password hint. To use the Password Assistant, click the key next to the New Password field. See Tips for creating secure passwords.
To give a user permission to access your shared files or screen, you may need to change settings in the File Sharing, Screen Sharing, or Remote Management pane of Sharing preferences. See Set up file sharing and Share the screen of another Mac.