Owner level password applies the securities like copying, printing, modifying text, editing, or extracting pages from PDF files. Where the User level security prevents other users from opening or viewing the PDF. It requires the correct password to access the PDF document. Both types of security can be easily deleted by this Mac utility for PDF restrictions. But, if the file is having user level password security then, in the beginning, it is necessary to enter the PDF password and after that the tool will unlock PDF document.