Mac Codesigning stops working. (revSecurity.dylib)

Kee Nethery kee.nethery at
Sun Sep 29 15:58:50 EDT 2019

My lesson on app signing isn’t automated, it has the terminal commands detailed. The reason I do that is because it’s a moving target. Things change as the codesign process updates. 

If my lesson steps fail, you’ll probably see the exact reason as an error message. That should be the clue.

Kee Nethery

> On Sep 29, 2019, at 12:46 PM, Tony Trivia via use-livecode <use-livecode at> wrote:
> Hi all.
> I had the whole Mac codesigning thing under control, notarization, all
> that. Was successfully signing, notarizing and distributing (as third
> party) my MacOS app as recently as a week ago.  But about two days,
> AppWrapper 3 started reporting "Failed to sign" blaming the subcomponent
> revSecurity.dylib.  App Wrapper diagnosis says "code object is not signed
> at all in architectur: x86_64.
> My build is in LC 9.5 using 64-bit.
> I built a minimalist stack with one "go url" button to trigger inclusion of
> revSecurity and TSnet. Attempts to sign that minimal stack as a Mac
> standalone gets the same errors.
> Codesigning via Terminal also fails.
> Anyone else have this problem? Suggestions?
> Thanks!
> TT
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