here's the thing

Mac tip: How to sign a PDF without a printer or a scanner

Got a contract or some other document that you need to sign and return via email? Well, you could always print it out, sign on the dotted line, scan the newly-signed document, and then send the new version as an email attachment—an effective, if cumbersome process.

Another, better option: snap a photo of your John Hancock with your Mac’s iSight camera (just about any recent iMac or MacBook should have one), then paste it into the document you need to sign.

It’s a nifty trick—and one I wish I’d discovered a little earlier, given all the time I’ve been wasting slapping signed contracts onto my printer’s scanner glass.

All you need is latest version of Preview, the Mac software that lets you open photos, PDFs, Word files, and other documents.

[Note: Your Mac needs to be running on “Lion,” the new version of the Mac operating system, for this feature to work.]

Here’s how to get started.

That’s it! Now you can save, print, or email the signed PDF as you see fit, no scanner required. You can also saved your scanned signature for future use, or delete it if you don’t want it sitting on your hard drive.

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Note: This updated and revised article was first published in December 2011.