How to Sign PDF On Mac
Signing PDFs on your Mac is a daily necessity for contracts, NDAs, approval forms, and official correspondence. macOS Preview includes a basic signature tool using your trackpad or camera, but it's limited to one signature style and offers no date stamping or form-filling. SublimePDF provides a professional signing workflow in your browser with reusable signatures, typed and drawn options, and automatic date insertion.
Follow the step-by-step instructions below, then use the free tool directly — no registration or download required.
Open Tool →How to Sign PDF On Mac — Step by Step
Open SublimePDF's sign tool
Navigate to the signing page in Safari, Chrome, or any Mac browser. Drag and drop your PDF from Finder directly onto the page for quick upload.
Upload the document
Click the upload area or drag the PDF file from your Desktop, Downloads, or any Finder window. The document renders with all pages visible in a scrollable view.
Create or select your signature
Draw a signature using your trackpad or mouse, type your name and choose from professional signature fonts, or upload a scanned signature image. Previously saved signatures appear for instant reuse.
Place signatures and initials
Click anywhere on the document to place your signature. Drag to reposition and use the corner handles to resize. Add initials on pages that require them.
Insert date and text fields
Use the date tool to add the current date in your preferred format (MM/DD/YYYY, DD/MM/YYYY, etc.). Add text annotations for any additional required fields.
Download the signed document
Click download to save the signed PDF. The signature is permanently embedded in the document and cannot be removed by the recipient.
Pro Tips
- 💡 macOS Preview's trackpad signature capture (Tools → Annotate → Signature) creates a basic signature, but it can't be placed precisely and lacks date stamping. Use SublimePDF for multi-field signing.
- 💡 If you sign documents frequently, save your signature in SublimePDF once and reuse it across all future documents — much faster than Preview's camera capture each time.
- 💡 For contracts requiring witnesses, use SublimePDF to add your signature, then send the document to the next signer. Each person signs independently.
- 💡 Use Cmd+Z to undo any misplaced signature before saving. After downloading, the signatures are permanently flattened.
Privacy & Security
All processing happens directly in your browser. Your files are never uploaded to any server — they remain on your device throughout the entire process. SublimePDF uses WebAssembly technology for fast, secure, client-side processing.
Works Everywhere
This tool works on any modern browser — Chrome, Firefox, Safari, or Edge — on desktop, tablet, or mobile. No software to install. PDF is an open ISO standard supported by all major platforms.
How to Sign PDF On Mac — FAQ
How do I sign a PDF in Preview on Mac?
Can I use my Mac trackpad to draw a signature?
Is a digital signature the same as an electronic signature?
Will the recipient be able to remove my signature?
Related Guides
How to Sign a PDF Electronically
Electronic signatures are legally binding in most countries under laws like ESIGN (US), eIDAS (EU), and similar regulations. SublimePDF lets you sign any PDF for free — draw your signature, type it, or upload an image.
How to Sign PDF On iPhone
Signing PDFs on your iPhone lets you approve contracts, sign forms, and authorize documents without a printer or desktop computer. While iOS has a built-in Markup tool for basic signatures, SublimePDF offers a more complete signing experience directly in Safari — with typed, drawn, and uploaded signature options, plus the ability to initial multiple pages and add dates automatically.
How to Digital Vs Electronic Signatures
Understanding the difference between digital signatures and electronic signatures is essential for choosing the right signing method for your documents. While the terms are often used interchangeably, they serve different purposes: electronic signatures capture consent (like signing with your finger on a screen), while digital signatures use cryptographic certificates to verify identity and detect tampering. Choosing the wrong type can leave your documents legally vulnerable or unnecessarily complex.