Sign PDF on Mac

Sign PDF on macOS.

Name: PrivaPDF Sign PDF on Mac
Author: PrivaPDF

Looking for the best way to sign a PDF on Apple Mac? Learn how to sign with built-in macOS Preview or directly in your browser with PrivaPDF.

Sign PDF on Mac Convert PDF →

No account needed · zero uploads, verifiable in DevTools

—Works on Safari, Chrome, and Firefox

—Compatible with macOS, iOS, and iPadOS

—Draw signature with Trackpad or Mouse

—No software installation needed

—100% private and offline-capable

How to Sign a PDF on macOS

Mac users have several convenient ways to sign PDF documents. Here, we outline the two simplest and most secure methods: using macOS Preview and using PrivaPDF in your web browser.

Method 1: Using macOS Preview

Preview is the built-in PDF viewer on macOS. To sign:

Open your PDF in Preview.
Click the markup toolbar button (the pen icon).
Click the Signature icon and select "Create Signature".
Draw your signature on the trackpad or hold a piece of paper with your signature up to the camera.
Place it on the document.

Method 2: Using PrivaPDF (Universal & Private)

If you prefer not to store your signature permanently in iCloud, or if you're using a web browser and want a fast solution without leaving your browser tab:

Go to the PrivaPDF Sign Tool.
Select your PDF file.
Draw your signature using your trackpad or mouse.
Download the signed file.

Don't trust us.
Verify it yourself.

Open DevTools → Network while converting. You'll see zero outbound requests. Every byte stays inside your browser tab.

—Works offline — no internet connection required

—Nothing is uploaded — ever

—Designed for sensitive documents

ZERO OUTBOUND CALLS

ElementsConsoleNetworkSources

FilterAll · XHR · JS · Wasm

NameStatusTypeSize

converter.worker.js200script48 kB

pdf.worker.wasm200wasm312 kB

✓ No requests to external servers

Common questions

Can I use Apple Preview to sign a PDF?

Yes, Preview has a built-in signature tool. However, if you are looking for an independent browser-based tool that works across all your devices and doesn't sync your signature to iCloud, PrivaPDF is a great choice.

Does trackpad signing work on Mac?

Yes, PrivaPDF supports drawing your signature using your Mac's trackpad, mouse, or connected tablet.

Is my file uploaded to a server?

No. All processing happens entirely in your browser using WebAssembly. Your file never leaves your device.