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How to password protect a PDF on a Mac computer to secure sensitive files

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Encrypting your PDFs on Mac will keep sensitive files safe. Hollis Johnson/Business Insider
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It takes about 10 seconds to add password protection to a PDF when you use a Mac's Preview software, and those few seconds you invest could save you hours of work and thousands of dollars if securing that document now prevents information theft later.

Whenever you are sharing a PDF with even potentially sensitive information, such as your address, bank info, Social Security number, and more, you owe it to yourself to encrypt the file, securing it with a password.

How to password protect a PDF on Mac
Password protected PDFs ensure that only the people you want can access them.  Steven John/Business Insider

Here's the quick and easy process for doing it.

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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.

3. At the bottom of the pop-up window, check the box next to "Encrypt."

How to password protect a PDF on Mac
If you wish to keep both a password locked and a standard copy of the PDF, make sure you save the encrypted version using a different name.  Steven John/Business Insider

4. Enter a password, then re-enter it where indicated to verify, then hit save.

How to password protect a PDF on Mac
Click "Save" to set a password for your PDF.  Steven John/Business Insider

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Steven John has been a freelance writer for more than a dozen years and has been a regular contributor to Business Insider since 2017. His work includes a focus on the tech world, covering companies including Apple, Microsoft, Meta, Google, and others. He also reviews restaurants, shares how-to cooking articles, and writes general interest pieces.Steven also writes for publications including Architectural Digest, The Daily Beast, Forbes, and more. In the past, he also wrote for New York Magazine, Mashed, U.S. News & World Report and other outlets. He runs his own outdoor lifestyle site, Dad Gear Review, and co-hosts the Fact Trekkers podcast with his son. He has had two novels published, Three A.M. and Outrider. He graduated from Emerson College with a degree in communications focused on filmmaking.He is an avid outdoorsman and can be frequently found in a kayak or on a mountain trail, often with his family along for the adventure.Expertise:Tech industryTech hardwareOutdoorsCookingRestaurantsDIYPopular articles:Microsoft: A history of the software giant co-founded by Bill Gates, its products and services, jobs, layoffs, and moreYouTube is a major entertainment force. Here's the platform's history, plus how to create a channel and upload videos.Inside the life and career of Bill Gates, the Microsoft co-founder, billionaire, and philanthropistTim Cook net worth: How the Apple leader earns and spends his moneyBecoming an Amazon seller is a simple process. Here's what's involved, plus how you make money and get paid.