A PDF file can be encrypted by open password and owner password. Open password only allows the people who have the password to access the secured PDF. Owner password can prevent others from editing, copying or printing the PDF without permission.

However, these encrypted PDF files are very inconvenient in some cases. If you want to use the protected PDF files freely, PDF Password Remover is your best choice. It enables you to remove PDF open password as well as get rid of the copy, edit and print restrictions at ease.

Watch Video Demo:
[ame=http://www.youtube.com/watch?v=Kper8kjwAjY][PDF Password & Restriction Remover] How to Unlock encrypted PDF files on Mac ? - YouTube[/ame]