Control access to your Public folder on Mac
You can set up your Public folder so other users on your network can access files in it.
On your Mac, choose Apple menu > System Preferences, then click Sharing.
If file sharing is not already turned on, select the File Sharing tickbox.
Below Shared Folders, select your Public folder.
Below Users, choose a setting from the Everyone pop-up menu.
Read & Write: The user can see and copy files to and from the folder.
Read Only: The user can view the contents of the folder but can’t copy files to it.
Write Only (Drop Box): The user can copy files to the folder but can’t view its contents.
No Access: The user can’t see or copy files from the folder.