My Swift macOS App does not run from Xcode

Question

Created Nov ’21

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This problem is really driving me crazy. I created this IoT app to work on my Mac Pro running Mojave. I use Xcode 11.3.1 and Swift.

My app is running properly when I say "Sign to run locally". But as soon as I switch to development and sign it, it will not run anymore. There is no sign of a problem, it just says:

Finished running App : App

No other message. When I switch on debugging (Scheme -> Debug Executable) it says:

Message from debugger: Error 1

I cannot run my application locally because I need an entitlement to register the IoT devices.

So now I ask for your help or suggestion. Something is obviously wrong, but what and how do I find it? I tried a couple of things like reinstalling Xcode, but no result so far.

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Answer 1

SevenSeas OP

Nov ’21

I tried different things, but no success so far.

Creating a new project from scratch
Switching to another computer
Creating new credentials

This is really though, as there is no indication as to what goes wrong. It could be some setting that I have wrong, but why does it work in run locally. So my current best guess is that something is wrong with my credentials. That's the reason I tried item 3.

Does anyone have suggestions how to find out whether my credentials are the source of the problem. Any suggestions what I could also try would be appreciated.

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Answer 2

SevenSeas OP

Nov ’21

Today it appeared as if I magically made it to work: After receiving the multicast entitlement I followed these steps: https://developer.apple.com/forums/thread/663271 Alas in the end no success.

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Answer 3

SevenSeas OP

Nov ’21

I think that I solved it. The following article proved helpful: https://developer.apple.com/library/archive/technotes/tn2250/_index.html#//apple_ref/doc/uid/DTS40009933-CH1-TNTAG19

My problem was in chapter: How do I resolve the CodeSign error: CSSMERR_TP_NOT_TRUSTED?

After downloading and installing the necessary Apple Certificates my App worked. I got the above mentioned error message when running:

codesign -v <MyApp>

Without debugger my app works, in Xcode I still get a secinit error that I still need to solve. But at least my apps can work now.

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