On your Mac, select the drive, folder, or file, then choose File > Get Info.
If the information in Sharing & Permissions is not visible, click the arrow .
If the key at the bottom right is locked, click it to unlock Get Info, then enter the administrator's name and password.
bubble shooterClick a user or group in the Name column, then choose a permission setting from the pop-up menu.
Read & Write: Allows the user to open the item and change the item.
Read-Only: Allows the user to open the item but not change its contents.
Write Only (Drop Box): Creates a folder in a drop box. Users can copy items to the drop box, but cannot open them. Only the drop box owner can open items.
No Access: Block all access to the item.
You can undo any changes to user or group privilege settings in the Sharing & Permissions section since you opened the Info window. Before closing the Info window, click the Action pop-up menu , then choose “Restore Changes.”