If you have sensitive PDF documents like tax returns or bank statements on your Mac, you should password protect them. The built-in Preview app makes this incredibly easy without needing third-party software.
How to Password Protect a PDF
- Open your PDF file using the Preview app.
- Click on File in the top menu bar.
- Select Export (do not choose “Export as PDF”).
- In the save dialog, check the box next to Encrypt.
- Type and verify your password, then click Save.