How to Sign a PDF on Mac Free — Without Adobe Acrobat (2026)
To sign a PDF on Mac for free without Adobe Acrobat, use Mac's built-in Preview app — open the PDF, click the markup toolbar, click the Signature tool, draw your signature on the trackpad or use your camera, and save. Alternatively, use RaptorPDF in Safari for more signing options. Both methods are completely free and keep your document local.
In This Guide
Method 1: Mac Preview — Sign PDF Free (Built-In)
Mac Preview is pre-installed on every Mac and has a built-in signature feature. This is the fastest method for Mac users — no additional software or websites needed.
1 Open the PDF in Preview
Double-click the PDF file. If it opens in Adobe Reader or another app, right-click the file, choose "Open With" and select "Preview".
2 Show the Markup Toolbar
Click the markup icon in the toolbar (the pen-tip icon, or go to View > Show Markup Toolbar). A row of annotation tools appears at the top of the document.
3 Open the Signature Tool
Click the Signature button in the markup toolbar — it looks like a cursive letter. If you have a saved signature, it will appear in the dropdown. If not, click "Create Signature".
4 Create Your Signature
Choose your signature creation method:
- Trackpad: Click "Trackpad", then sign your name slowly with your finger on the trackpad. Press any key when done.
- Camera: Sign your name on white paper in black ink, hold it up to your Mac's camera. Preview captures the signature automatically.
- iPhone/iPad: Use your phone to draw the signature (Continuity Camera feature on newer macOS).
Click Done to save the signature.
5 Place Your Signature
Click the Signature button again and select your saved signature from the dropdown. It appears on the PDF as a moveable, resizable element. Drag it to the signature line and resize to fit.
6 Save the Signed PDF
Press Cmd+S to save, or go to File > Export as PDF to save a new copy. The signature is now embedded in the PDF.
Tips for Better Preview Signatures
- Use a stylus on the trackpad for a more natural signature
- For camera method: good lighting and high-contrast black pen on white paper gives the cleanest result
- Your signature is saved in Preview for future use — you don't need to recreate it each time
Method 2: RaptorPDF in Safari Browser
RaptorPDF works in Safari on Mac and offers additional signature options. Your file never leaves your Mac.
1 Open RaptorPDF in Safari
Go to raptorpdf.com/protect-pdf.html in Safari on your Mac.
2 Open Your PDF
Click to open the PDF you need to sign. Drag from Finder if you prefer.
3 Create and Place Your Signature
Use the signature tool to: draw with your mouse (or trackpad), type your name in a cursive-style font, or upload an image of your handwritten signature. Position and resize the signature on the document.
4 Download the Signed PDF
Click Download. The signed PDF is saved to your Mac's Downloads folder. Your file was never transmitted anywhere.
RaptorPDF also lets you annotate the document and add text to fill in other form fields in the same session, which is more convenient than going back and forth between tools.
Method 3: Adobe Acrobat (Paid — Full Features)
If you have Adobe Acrobat Pro ($239/year), the signing workflow is polished and professional:
- Open the PDF in Acrobat
- Click "Fill & Sign" in the right panel
- Click the signature field or "Sign" button
- Draw, type, or upload your signature
- Click Apply and drag to position
- File > Save
Acrobat also supports digital certificate signatures (cryptographic signatures with identity verification) — different from and legally stronger than visual signatures.
Method 4: DocuSign (For Tracked, Legally Binding Signatures)
When you need more than a visual signature — specifically, when you need a legally tracked e-signature workflow with timestamps, audit trails, and signer identity verification — DocuSign (docusign.com) is the industry standard.
- Free tier: 3 documents per month as a sender
- Paid plans: ~$15/month for personal use
- Creates a tamper-evident audit trail that shows exactly when each party signed
- Required for some legal and real estate documents
Method Comparison: Which Should You Use?
| Method | Cost | Speed | Local Processing | Best For |
|---|---|---|---|---|
| Mac Preview | Free | Fastest | Yes | Everyday signing, Mac users |
| RaptorPDF (Safari) | Free | Fast | Yes | Signing + other PDF edits in one session |
| Adobe Acrobat | $239/year | Fast | Yes (desktop) | Power users needing full PDF suite |
| DocuSign | Free (3/mo) | Moderate | No (cloud) | Legally tracked e-signatures with audit trail |
For most Mac users: Use Preview for quick everyday signing. Use RaptorPDF when you also need to annotate or edit the document. Use DocuSign when you need a formal, tracked e-signature for important legal agreements.
Sign PDF on Mac — Free, No Upload, Instant
Draw, type, or upload your signature. Files stay on your Mac. No Adobe Acrobat needed.
Sign PDF FreeFrequently Asked Questions
How do I sign a PDF on Mac for free?
Method 1 (fastest): Mac Preview — open PDF, click markup toolbar, click Signature, create signature on trackpad or camera, drag to position, save. Method 2 (more options): RaptorPDF in Safari — go to raptorpdf.com/protect-pdf.html, open PDF, sign, download. Both are free and process files locally.
How do I use Mac Preview to sign a PDF?
Open PDF in Preview → click markup toolbar → click Signature button → Create Signature → sign on trackpad or use camera → Done → click Signature again and select it → drag to signature line on document → resize → save.
Can I sign a PDF on Mac without downloading software?
Yes. Mac Preview is already installed — no download needed. Or use RaptorPDF in Safari — no installation needed. Both are free and process files locally on your Mac.
Is a Preview signature on Mac legally binding?
A Preview signature is a visual signature (embedded image). In many jurisdictions it's legally valid for common documents. For documents requiring a cryptographic audit trail (some real estate, legal filings), use DocuSign or a dedicated e-signature service instead.
How do I sign a PDF on Mac with trackpad?
In Mac Preview: open PDF → show markup toolbar → click Signature → Create Signature → select Trackpad → sign your name slowly with your finger → press any key → Done. Your signature is saved for future use.
What is the difference between signing in Preview vs RaptorPDF?
Mac Preview: built-in to every Mac, works offline, excellent trackpad and camera signature creation. RaptorPDF in browser: works on any OS, offers draw/type/upload options, also allows editing and annotating in the same session. Both are free and keep files local.