Code signature not valid when running on Simulator in Xcode 16

Question

Created Sep ’24

Replies 10

Boosts 0

Participants 3

I just upgraded to Version 16.0 (16A242d) and unfortunately the App that used to run perfectly fine on Xcode 15 is now broken. It crashes right after showing the Launch Screen on the Simulator. Here's the formatted error message in the Console:

dyld[80159]: Library not loaded: @rpath/AppName-iOS.debug.dylib
  Referenced from: <App ID> /path/to/AppName-iOS.app/AppName-iOS
  Reason: tried: '/path/to/DerivedData/AppName-iOS.debug.dylib' (no such file), 
          '/path/to/CoreSimulator/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection/AppName-iOS.debug.dylib' (no such file),
          '/path/to/AppName-iOS.app/AppName-iOS.debug.dylib' (code signature not valid for use in process: Trying to load an unsigned library), 
          '/path/to/DerivedData/PackageFrameworks/AppName-iOS.debug.dylib' (no such file), 
          '/path/to/AppName-iOS.app/Frameworks/AppName-iOS.debug.dylib' (no such file),
          '/path/to/CoreSimulator/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/AppName-iOS.debug.dylib' (no such file)

For some reason the Library is unsigned and I've checked all the settings with no luck.

Answered by xploit in 806854022

Hello!

I had the same issue and I just figured the origin! My app entry point is in a package, so I have no swift file in my project (outside of the lib). I guess that's why AppName-iOS.debug.dylib doesn't exist.

I created an empty struct and now it works fine with Xcode 16.

I hope it helps,

Cédric

Boost

Answer 1

DTS Engineer OP

Apple

Sep ’24

If you create a new test project from the iOS > App template, does it have the same problem?

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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Answer 2

omidontop OP

Sep ’24

Thank you for your response. Yes a test project using the iOS > App template works alright.

0

Answer 3

DTS Engineer OP

Apple

Sep ’24

Cool.

Was your main Xcode project created by some third-party tooling? Or was it originally with Xcode?

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

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Answer 4

omidontop OP

Sep ’24

No no, using Xcode. But a while ago, April 2019 to be exact.

0

Answer 5

DTS Engineer OP

Apple

Sep ’24

OK.

Xcode 16 introduced a new setting, Enable Debug Dylib Support that puts all of your app code into a dynamic library, replacing the app executable with a trivial stub that loads and runs that library. It seems that the stub is unable to load the library for some reason.

As a diagnostic test, try disabling that setting. Does that help?

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

0

Answer 6

omidontop OP

Oct ’24

You were absolutely right! Disabling ENABLE_DEBUG_DYLIB helps. What's the correct solution then?

0

Answer 7

xploit OP

Oct ’24

Accepted Answer

Hello!

I had the same issue and I just figured the origin! My app entry point is in a package, so I have no swift file in my project (outside of the lib). I guess that's why AppName-iOS.debug.dylib doesn't exist.

I created an empty struct and now it works fine with Xcode 16.

I hope it helps,

Cédric

1

Answer 8

DTS Engineer OP

Apple

Oct ’24

@omidontop, you might wanna ask @xploit that in a reply rather than a comment. It’s easy for folks to miss comments.

ps For this and other titbits, see Quinn’s Top Ten DevForums Tips.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

1

Answer 9

xploit OP

Oct ’24

I just created a swift file in my project with this code:

struct Empty {}

1

Answer 10

omidontop OP

Oct ’24

Thanks @xploit! That was genius. Solved that and another issue.

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