You download it for free trial and install it on your Mac computer. If you want to remove the open password or forget the permission password, you might need PDF Password Remover for Mac. You can use an open password to deny those reader that do not have the password to open it, and permission password to restrict permissions of printing, copying, editing or commenting the PDF files. It supports open and permission password to protect PDF files on two different ways. PDF file format is popular and powerful electronic document format. It can also directly remove permission passwords of PDF that restrict the printing, copying, modifying and copying permissions. PDF Password Remover for Mac is developed for removing open passwords (user password) of PDF files.