How to Sign a PDF on Mac for Free

There are several ways to sign a PDF on a Mac without printing documents or dealing with paper. You can use built-in apps, PDF editors, or online tools.

Before you start, it helps to know the two main types of signatures:

• Electronic signature: a visual signature you draw, type, or insert as an image. This works for most everyday documents.
• Digital signature: a certificate-based signature that verifies your identity. It’s usually used for contracts or documents that require higher security.

In this guide, you’ll learn the easiest ways to sign a PDF on macOS and when to use each one.

Fast Track: Sign PDF on Mac

Quick Comparison: Best Ways to Sign PDF on Mac

Not sure which method to choose? Here’s a quick overview to help you compare your options.

How to Add Signature to PDF in Preview

Preview is the default PDF viewer on macOS, so you can sign a PDF without installing anything. It’s the quickest option if you just need to add a simple signature.

1. Open your PDF in Preview.

2. Click Show Markup Toolbar (the pen icon).

3. Select the Signature icon.

4. Click Create Signature, then choose one of the following options:

• Trackpad: draw your signature using your finger. Pressing harder on the trackpad can create thicker lines.
• Camera: sign your name on paper, hold it up to your Mac’s camera, and capture the handwritten signature.
• iPhone or iPad: choose your device in Preview, and a signing window will appear on it automatically. You can then sign using your finger or Apple Pencil, and it will sync back to your Mac.

5. Click to insert the signature into your document and adjust its size or position.

How to Insert Signature on Mac with PDFgear

For simple documents, Preview is often enough. But sometimes you need more control, such as editing content, filling out forms, or signing multiple pages. You may also need to insert a digital signature for higher security. In these cases, PDFgear is a practical alternative.

This makes it especially useful for contracts, applications, or multi-page documents where a simple signature is not enough.

Create and Add Electronic Signature on Mac with PDFgear

1. Download PDFgear and open your PDF in PDFgear.

2. Click Signature in the toolbar.

3. Create your signature. You can choose the method that fits your needs:

• Draw: best for documents that require a handwritten-style signature.

• Type: suitable for formal or repetitive documents where consistency matters.

• Import an image: ideal if you already have a saved or scanned signature.

4. Click to place the signature on the document, then adjust its size or position.

5. Click Apply Signature to insert the signature into the PDF, then save the file.

Create and Add Digital Signature on Mac with PDFgear

In addition to electronic signatures, PDFgear also supports adding a digital signature for documents that require identity verification and higher security.

1. Open your PDF in PDFgear and go to the Protect toolbar.

2. Click Encrypt with Certificate.

3. Click on the position where you want to place the signature. A pop-up window will appear.

4. Choose your digital certificate (or import one if needed).

5. Click Sign to add the digital signature, then save the file.

Why Many Users Prefer PDFgear for Signing PDFs on Mac

• Complete form fields and add your signature in the same workflow without switching tools.
• PDFgear allows you to edit existing PDF text before signing at no cost, while many editors require a paid plan.
• Add the same signature to multiple pages in one step, while most signing tools require placing it page by page.
• PDFgear also supports digital signatures for documents that require identity verification and higher security.

Sign PDF Online on Mac with PDFgear Online Signer

Sometimes you just need to sign and download a file quickly. This is common when you’re using a shared computer, a work device, or just handling a one-time document.

In these cases, an online tool like PDFgear Online Signer can be the fastest option. It works directly in your browser and lets you sign a PDF in seconds.

1. Go to PDFgear Online Signer, then click the Select PDF File button.

2. Click the Signature tool and create your signature by drawing, typing, or uploading an image.

3. Place the signature anywhere on the PDF where you need to sign. You can drag to move it, and resize it to fit perfectly within the signature field.

4. Click Save PDF to download the signed PDF.

Signatures are usually not saved for reuse, so you may need to recreate them each time. If you sign PDFs frequently or need more control, using the PDFgear software can be a better long-term option.

How to Sign a PDF with Adobe Reader on Mac

Adobe Acrobat Reader is a widely used PDF tool on Mac. It supports adding electronic signatures and lets users add digital signatures with certificate verification, making it ideal for professional or business documents.

1. Open your PDF in Adobe Acrobat Reader.

2. Click Fill & Sign in the toolbar.

3. Select Add Signature.

4. Create an electronic signature and place the signature.

5.  Save the file.

For simple and frequent signing, many users prefer lighter alternatives that are easier to use and more flexible.

Request and Track Signatures on Mac with eSignGear

Sometimes signing a PDF isn’t just about adding your own signature. You may need to send a document to others, collect signatures, and track the progress along the way.

This is common for contracts, agreements, or approval workflows. In these cases, a tool like eSignGear helps you manage the entire signing process in one place. It is part of the PDFgear ecosystem, designed for sending documents and managing signatures across multiple people.

1. Upload your PDF to eSignGear and sign in to your account.

2. To sign the document yourself, drag a signature field into the PDF and add your signature by drawing, typing, or uploading an image.

3. To collect signatures from others, enter the recipients’ email addresses. You can also set an expiration date and reminder rules.

4. Drag and place signature fields for each signee, then click Finish and Send to request signatures.

5. Track the signing status in real time. Once all signees have completed the document, you can download the signed PDF.

FAQs

How to sign a PDF with Apple Pencil on Mac?

Open your PDF in Preview and click the Signature icon. Choose the option to add a signature from your iPhone or iPad. Your device will connect automatically. Then use your Apple Pencil to sign, and the signature will sync to your Mac.

Can I protect my PDF with a signature from being edited?

Yes, but it depends on the type of signature. Electronic signatures can be moved or edited unless you flatten them. PDFgear allows you to flatten the signature so it becomes part of the document and cannot be easily changed.

You can also save or print the PDF as a final version to reduce the risk of further edits. For stronger protection, using a digital signature is more secure, as it allows you to validate the signature and detect any changes to the document.

Is it secure to use an online PDF signer?

PDFgear Online Signer processes your files locally in your browser, so your documents are not uploaded to third-party servers. Your files stay on your device, which helps protect your data. See Method 3 above for the steps.

Which is the best app for signing legal documents on Mac?

For legal or business documents, tools that support digital signatures and audit trails are recommended. PDFgear is a good option for flexible signing, while platforms like eSignGear are better for sending documents and tracking signatures.

How to digitally sign a PDF on Mac?

To digitally sign a PDF on Mac, open it in PDFgear, go to the Protect toolbar, and select Encrypt with Certificate. Add your digital signature, which can be validated to ensure the document hasn’t been altered.

When should I use a digital signature instead of an electronic signature?

Use an electronic signature for everyday documents, such as forms or approvals. Choose a digital signature when you need stronger security, identity verification, or tamper protection, such as for contracts or official files.

If you’re unsure which one fits your needs, see this guide on digital signature vs electronic signature.

Conclusion

Signing a PDF on Mac is straightforward once you choose the right method. Built-in tools like Preview work well for quick signatures, while PDFgear offers more flexibility for editing, form filling, and multi-page documents.

PDFgear online signer is convenient when you don’t want to install software, and workflow platforms like eSignGear are better for sending documents and tracking signatures.