You probably already know how to password protect your computer, locking out other, but if you know how to password protect folders you can safely let others use your ...

This is particularly true if you allow multiple people to use your computer. For your most sensitive files, it's a good idea to create a password-protected folder, for an extra layer of protection.

How to password protect a PDF on Mac 1. Open the PDF that you want to password protect, then click "File" in the taskbar at the top of the screen. 2. Select "Export…" from the dropdown menu.