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Editorial Team
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Asked: 2026-05-23T07:18:08+00:00

I keep getting this error: Invalid Signature – This error occurs when you have

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I keep getting this error:

Invalid Signature – This error occurs when you have signed your app’s installer incorrectly. There are two certs required for this process: the “3rd Party Mac Developer Application” cert and the “3rd Party Mac Developer Installer” cert. When signing your package, you need to ensure that you are using the Installer cert to sign your package. Ensure that you are specifying this cert when submitting your app via the Xcode Organizer or when running productbuild from the command line.

I’ve googled, and have followed instructions but to no avail.

I have:

Projects > targets > build > code signing > 3rd Party Mac Developer Application:

Then when I go to archive and it opens up Organizer I go to submit I select the ‘3rd Party Mac Installer’ key. But it still fails 🙁

Do I need to do anything else? Like clean and then build first? (Build for what? Or just select build? – Although I’ve tried pretty much all of them first, and then archive).

If it’s of relevance I am using MacRuby, and had to do this first to set it up for xcode deployment: http://redwoodapp.posterous.com/macruby-and-xcode-4-build-a-self-contained-ma

Any help appreciated – I’m tearing my hair out here 🙁

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1 Answer

  1. Editorial Team

    Think this is finally sorted – thanks to Daniel from the MacRuby mailing list. I actually ended up creating a ticket with Apple, but hopefully they won’t charge me for it now it’s been fixed without them.

    You can view the solution here: http://astonj.com/uncategorized/invalid-signature-error-on-submitting-app-to-the-mac-app-store/

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