I have been using Skim for a while as my standard PDF reader. After migrating to a new MacBook Air with Mountain Lion (currently running 10.8.2), I can no longer launch Skim from Mail.app.

This same issue was reported to the Skim community ( http://sourceforge.net/tracker/?func=detail&aid=3557462&group_id=192583&atid=941981 ) and closed as invalid, as it was considered a problem with Mail.app, not Skim.

Does anyone know how to get this to work again?

1 Answer 1


I experience the same problem. I upgraded to OS X mountain Lion and I can confirm that opening .pdf attachments with skim fails when done directly from Mail.

The only workaround I know is to first save the .pdf somewhere (for instance the Desktop folder) and then skim works normally again.

  • I don't consider saving the PDF and then opening it to be a workable work-around — I hadn't asked the question if it had been… Commented Dec 19, 2012 at 11:59

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