Library not loaded: @rpath/AppThinning.framework/Versions/A/AppThinning (Xcode 16)

[lszl84]

Description

Xcode 16 is now officially released and required for AppStore distribution

However, after updating to Xcode 16, the MAUI apps stop building (VSCode, MacOS). I've read somewhere that Xcode support is planned for .NET 9, to be released in November. Does that mean we won't be able to publish MAUI apps for next few months?

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dlopen(/Applications/Xcode.app/Contents/SharedFrameworks/IDEDistribution.framework/Versions/A/IDEDistribution, 0x0001): Library not loaded: @rpath/AppThinning.framework/Versions/A/AppThinning

  Referenced from: <33FF2F3B-A96F-37B4-BA4E-887BD882BF9D> /Applications/Xcode.app/Contents/SharedFrameworks/IDEDistribution.framework/Versions/A/IDEDistribution

  Reason: tried: '/usr/local/share/dotnet/packs/Microsoft.iOS.Sdk.net8.0_17.5/17.5.8030/tools/lib/mlaunch/mlaunch.app/Contents/Frameworks/AppThinning.framework/Versions/A/AppThinning' (no such file), '/Applications/Xcode.app/Contents/SharedFrameworks/IDEDistribution.framework/Versions/A/Frameworks/AppThinning.framework/Versions/A/AppThinning' (no such file), '/usr/local/share/dotnet/packs/Microsoft.iOS.Sdk.net8.0_17.5/17.5.8030/tools/lib/mlaunch/mlaunch.app/Contents/Frameworks/AppThinning.framework/Versions/A/AppThinning' (no such file), '/Applications/Xcode.app/Contents/SharedFrameworks/IDEDistribution.framework/Versions/A/Frameworks/AppThinning.framework/Versions/A/AppThinning' (no such file), '/usr/local/share/dotnet/packs/Microsoft.iOS.Sdk.net8.0_17.5/17.5.8030/tools/lib/mlaunch/mlaunch.app/Contents/MonoBundle/AppThinning.framework/Versions/A/AppThinning' (no such file)

        

error HE0004: Could not load the framework 'IDEDistribution' (path: /Applications/Xcode.app/Contents/SharedFrameworks/IDEDistribution.framework/Versions/A/IDEDistribution): 

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

8.0.82 SR8.2

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

None

Affected platforms

iOS

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

No response

[github-actions]

Hi I'm an AI powered bot that finds similar issues based off the issue title.

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it. Thank you!

Closed similar issues:

• XCode 16 support (#23817), similarity score: 0.80
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• MAUI 7.0 iOS Release build won't install on iOS 16 (#11838), similarity score: 0.75
• Unable to launch app on iOS from both VS and VS MAC (#16421), similarity score: 0.75

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[BrandanN21]

I was able to downgrade to Xcode 15.4 and continue developing with Net 8.

Our team was able to find this documentation on the Apple Developer website stating that the requirements for iOS App submissions is at a minimum developing with Xcode 15. Starting April 2025 it would be required to use the iOS 18 SDK (xcode 16).

Source 1: https://developer.apple.com/ios/submit/
Source 2: https://developer.apple.com/news/?id=utw4yhtp

I also turned off automatic updates for the app store so xcode won't update overnight with us knowing.

Hope this helps!

[BrandanN21]

@lszl84 In case you need it you can install xcode 15.4 from this link: https://developer.apple.com/download/all/

Once it is installed you need to ensure that your command line tools point to 15.4 instead of 16. I am able to have both xcode 16 and 15.4 installed on my machine at the same time.

If you are on MacOS Sequoia already someone has posted a workaround for issues with that. xamarin/xamarin-macios#20802 (comment)

[tj-devel709]

Thank you for the feedback @lszl84. As @BrandanN21 pointed out, there is a issue on the xamarin-macios repo tracking this issue already. Please refer to that thread there for further updates.

[Kremed]

@lszl84 In case you need it you can install xcode 15.4 from this link: https://developer.apple.com/download/all/

Once it is installed you need to ensure that your command line tools point to 15.4 instead of 16. I am able to have both xcode 16 and 15.4 installed on my machine at the same time.

If you are on MacOS Sequoia already someone has posted a workaround for issues with that. xamarin/xamarin-macios#20802 (comment)

My app has been rejected five times by the Apple App Review team, with a lot of unclear logs that seem to indicate crashes caused by some UI library or something similar. I released my app using Xcode 15.4. Could this be the reason for these rejections?