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Preview Signature Capture Not Working

Having no luck getting the signature capture to work in Preview. I go through the appropriate steps, hold up my signature to the iSight camera, get a perfectly wonderful looking capture, click Accept, go back into my document, click on the icon and it acts is if no signature has been captured. Go to manage signatures and none are there. Even better, it keeps the indicator light on my iSight camera from turning off - even when I close out of Preview. Only solution I've found for getting the indicator light to quit is to restart the computer ( i5 MacBook Air). Have tried several different PDFs and all the same result.


Any thoughts? Running lates version of Lion (10.7.1). Obviously not the end of the world, but would definitely come in handy. Thanks.

MacBook Air, Mac OS X (10.7.1)

Posted on Aug 27, 2011 6:15 PM

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39 replies

Jan 19, 2012 5:36 AM in response to Eytan Bernet1

As usual, Eytan nailed it - his proposed fix worked for me immediately. Too bad applecare wasn't as astute! Apparently, the problem is a consequence of some new feature in Lion that's supposed to prevent conflicts between applications simultanoeusly using certain resources. That's great, but it should not fail silently in the manner that it was.

Mar 15, 2012 3:55 PM in response to Solgravy

Hi Solgravy,

You could always scan in your signature (or use a camera to take a picture of it) and then paste it in as artwork. The signature is a new feature in Lion.

You could also try to get a copy of Preview for Lion from a Lion install and see if it will work in Snow Leopard. I have not tried this.

Lastly, you can get a 3rd party PDF application that supports signatures. PDFPen comes to mind.

May 16, 2012 4:21 AM in response to Eytan Bernet1

Eytan Bernet1 wrote:


Go to ~/library/preferences

delete all the preview preferences while preview is quit.

Relaunch Preview, and it should be fixed.

This was close to the solution. I ended up needing to delete ~/Library/Containers/com.apple.Preview to ultimately fix the problem. Within the container was a separate set of preferences for Preview.app which were not aliased or symlinked to the set in ~/Library/Preferences.

Preview Signature Capture Not Working

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