How to Add Signature to PDF Mac

Charlotte Daniels

Mac, Tutorials

Adding a signature to a PDF on a Mac can be a useful tool for professionals, whether you need to sign a document for work or simply want to add a personal touch to your files. Fortunately, the process is straightforward and can be done using built-in tools on your Mac. In this tutorial, we will guide you through the steps of adding a signature to a PDF on your Mac.

Step 1: Creating Your Signature

To add your signature to a PDF on Mac, you first need to create a digital version of your signature. There are two ways you can do this:

  • Using Trackpad: If you have a MacBook with Force Touch trackpad or Magic Trackpad, you can use your trackpad to create a signature directly on your Mac. Open Preview and go to the “Markup Toolbar” by clicking the toolbox icon in the top-right corner. From there, click on the “Signature” button and select “Trackpad”. Follow the instructions provided by Preview to create your signature using your trackpad.
  • Using Camera: If you prefer signing on paper and then scanning it onto your Mac, you can use the built-in camera feature in Preview.

    Again, open Preview and access the “Markup Toolbar”. Click on the “Signature” button and select “Camera”. Hold up your signed paper in front of the camera until it is captured clearly. You can adjust its position or resize it as needed.

Step 2: Adding Signature to PDF

Now that you have created your digital signature, it’s time to add it to a PDF document:

  1. Open PDF File: Locate and open the PDF file that requires your signature using the Preview application on your Mac.
  2. Access Markup Toolbar: Once the PDF is opened in Preview, click on the “Markup Toolbar” icon in the top-right corner of the window. This will open a toolbar with various annotation tools.
  3. Select Signature: From the Markup Toolbar, click on the “Signature” button and select your saved signature.

    The signature will appear as a draggable object on your PDF document.

  4. Position and Resize Signature: Click and drag your signature to position it in the desired location within the document. You can also resize it by dragging its corners or edges to make it fit perfectly into any designated signature field.
  5. Save Document: After adding your signature, save the changes made to the PDF file by clicking on “File” in the menu bar and selecting “Save” or using the shortcut Command + S. Your signed PDF is now ready to be shared or archived.


Congratulations! You have successfully learned how to add a signature to a PDF document on Mac using native tools like Preview.

This simple process allows you to add a personal touch and professional touch when signing digital documents, eliminating the need for printing and scanning paper copies. Remember, always double-check your signature placement before saving your changes to ensure accuracy. Now go ahead and start signing those important documents with ease!

I hope this tutorial has been helpful in guiding you through adding a signature to a PDF on Mac. Enjoy signing documents digitally!

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