Cannot build Maui 9 with macos-15

[sven-s]

Description

I am trying to build a Maui 9 project with the following command line:

dotnet publish -f net9.0-ios -c Release -p:ArchiveOnBuild=true /p:RuntimeIdentifier=ios-arm64 cpm-app/cpm-app.csproj

I am also setting the xcode version to 16.2 via

sudo xcode-select -s /Applications/Xcode_16.2.0.app/Contents/Developer

but I get the following error i the build:

2025-01-10 14:51:35.165 xcodebuild[8338:37797] Writing error result bundle to /var/folders/sg/7ncxbtp941dd9ql29twtl6jw0000gn/T/ResultBundle_2025-10-01_14-51-0035.xcresult xcodebuild: error: SDK "/Applications/Xcode_16.2.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk" cannot be located. 2025-01-10 14:51:37.449 xcodebuild[8480:38140] Writing error result bundle to /var/folders/sg/7ncxbtp941dd9ql29twtl6jw0000gn/T/ResultBundle_2025-10-01_14-51-0037.xcresult xcodebuild: error: SDK "/Applications/Xcode_16.2.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk" cannot be located. xcrun: error: sh -c '/Applications/Xcode_16.2.0.app/Contents/Developer/usr/bin/xcodebuild -sdk /Applications/Xcode_16.2.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -find actool 2> /dev/null' failed with exit code 16384: (null) (errno=No such file or directory) xcrun: error: unable to find utility "actool", not a developer tool or in PATH

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 20.04
• Ubuntu 22.04
• Ubuntu 24.04
• macOS 12
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• macOS 15
• macOS 15 Arm64
• Windows Server 2019
• Windows Server 2022
• Windows Server 2025

Image version and build link

20250106.547

Is it regression?

no

Expected behavior

The build should succeed

Actual behavior

The build fails

Repro steps

• build a maui .net 9 project

[aartis17]

@sven-s We will investigate the issue and keep you posted on further updates.
Thank you.

[DevDachi]

@aartis17 Thanks for looking into this. We are also facing same issue.

[maroy1986]

Faced the same issue. Had to change XCode to version 16.1 instead of 16.2 to make it work while waiting for a fix. It's been broken for almost a week now. See #11335 #11329 also.

[aartis17]

Hi @sven-s We are closing this issue as a duplicate of #11335. Please follow suggested item in order to be updated on the matter. Thank you.

[sven-s]

@aartis17 But #11335 targets another macos version. This issue is about maco15.

[sven-s]

@maroy1986 I tried Xcode 16.1, but that did not work:

The linker gives me this warning: ILLINK : warning MT0079: The recommended Xcode version for Microsoft.iOS 18.2.9170 is Xcode 16.2 or later.

And I got this error:

/Users/builder/azdo/_work/9/s/xamarin-macios/src/build/dotnet/ios/generated-sources/AVFoundation/AVAudioSession.g.cs(659): error MT4162: The type 'AVFoundation.AVAudioSessionMicrophoneInjectionMode' (used as a parameter in AVFoundation.AVAudioSession.SetPreferredMicrophoneInjectionMode) is not available in iOS 18.1 (it was introduced in iOS 18.2). Please build with a newer iOS SDK (usually done by using the most recent version of Xcode). [/Users/runner/work/1/s/cpm-app-extension-share/cpm-app-extension-share.csproj]

So to me, the version to go for .NET 9 Maui is Xcode 16.2

[aartis17]

Hi @sven-s ,
Could you please provide additional information about the .NET project and the workflow file you are using? I'll investigate it further.
Thanks.

[sven-s]

Hi @aartis17,

the solution is a .NET Maui project template which looks like this:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFrameworks>net9.0-android;net9.0-ios</TargetFrameworks>

    <OutputType>Exe</OutputType>
    <RootNamespace>Cpm.App</RootNamespace>
    <UseMaui>true</UseMaui>
    <SingleProject>true</SingleProject>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>

    <!-- Display name -->
    <ApplicationTitle>CPM 2</ApplicationTitle>

    <!-- App Identifier -->
    <ApplicationId>myapp</ApplicationId>

    <!-- Versions -->
    <ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
    <ApplicationVersion>1</ApplicationVersion>

    <NeutralLanguage>en-US</NeutralLanguage>
    <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">15.0</SupportedOSPlatformVersion>
    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">23.0</SupportedOSPlatformVersion>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net9.0-ios|AnyCPU'">
    <CodesignProvision>Automatic</CodesignProvision>
    <CodesignKey>iPhone Developer</CodesignKey>
    <CodesignEntitlements>Platforms\iOS\Entitlements.plist</CodesignEntitlements>
    <CreatePackage>false</CreatePackage>
  </PropertyGroup>

  <PropertyGroup Condition="'$(TargetFramework)' == 'net9.0-ios'">
    <RuntimeIdentifier>iossimulator-x64</RuntimeIdentifier>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net9.0-ios|AnyCPU'">
    <CreatePackage>false</CreatePackage>
    <CodesignKey>Apple Distribution: xxxx</CodesignKey>
    <CodesignProvision>CPM-App</CodesignProvision>
    <BuildIpa>true</BuildIpa>
    <IpaPackageName>cpm.ipa</IpaPackageName>
    <MtouchHttpClientHandler>HttpClientHandler</MtouchHttpClientHandler>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net9.0-android|AnyCPU'">
    <AndroidPackageFormat>apk</AndroidPackageFormat>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net9.0-android|AnyCPU'">
    <AndroidDexTool>d8</AndroidDexTool>
  </PropertyGroup>

  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <LangVersion>preview</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugSymbols>true</DebugSymbols>
    <WarningLevel>4</WarningLevel>
    <LangVersion>preview</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <!-- App Icon -->
    <MauiIcon Include="Resources\AppIcon\appicon.svg" ForegroundFile="Resources\AppIcon\appiconfg.svg" Color="#512BD4" />

    <MauiAsset Include="Resources\Raw\**" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
    <MauiSplashScreen Include="Resources\Splash\mysplash.svg" Color="#02137A" BaseSize="411,411" Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) != 'ios'" />

    <!-- Images -->
    <MauiImage Include="Resources\Images\*" />

    <!-- Custom Fonts -->
    <MauiFont Include="Resources\Fonts\*" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference ..  />
  </ItemGroup>

  <ItemGroup Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">
    <BundleResource Include="Platforms\iOS\PrivacyInfo.xcprivacy" LogicalName="PrivacyInfo.xcprivacy" />
    <MauiAsset Include="Platforms\iOS\Resources\de.lproj\InfoPlist.strings" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
    <MauiAsset Include="Platforms\iOS\Resources\en.lproj\InfoPlist.strings" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
    <BundleResource Include="Platforms\iOS\GoogleService-Info.plist" Link="GoogleService-Info.plist" />
    <MauiImage Include="Platforms\iOS\Resources\Images\splash_screen.jpg" />
    <InterfaceDefinition Include="Resources\LaunchScreen.storyboard" />
  </ItemGroup>

  ... other elements

</Project>

i use this workflow:

steps:

  - checkout: self
    displayName: 'git checkout'
    fetchDepth: 1
    fetchTags: false
    clean: true
    submodules: true

  - task: UseDotNet@2
    displayName: 'Use .NET SDK 9.0'
    inputs:
      packageType: 'sdk'
      version: '9.x'
      includePreviewVersions: false

  - task: Bash@3
    displayName: 'Restore workload used'
    inputs:
      targetType: 'inline'
      script: |
        dotnet workload install ios android maui
        dotnet workload restore cpm-app.sln
        dotnet restore --locked-mode cpm-app.sln
        dotnet --info

  - task: Bash@3
    displayName: 'Build iOS App'
    inputs:
      targetType: 'inline'
      script: |
        dotnet publish -f net9.0-ios -c Release -p:ArchiveOnBuild=true /p:RuntimeIdentifier=ios-arm64 cpm-app/cpm-app.csproj

Is that enough info?

[joshbartley]

@sven-s

This uses .net 9 with xcode 16.2 and publishes fine for our app. It's a bit truncated because of other steps to shuffle files around.

jobs: 
  build-ios:
      runs-on: macos-15
      #runs-on:      
      ##  group: cd_mac_runners
      name: iOS Build
      steps:
        - uses: maxim-lobanov/setup-xcode@v1
          name: Set XCode version
          with:
            xcode-version: latest-stable
      
        - name: Checkout
          uses: actions/checkout@v3
  
        - name: Setup .NET 9
          uses: actions/setup-dotnet@v2
          with:
            dotnet-version: 9.0.x  


        # a lot of other setup stuff


        - name: Publish MAUI iOS
          env: 
            ENTITLEMENTS: 'src/Maui/Platforms/iOS/Entitlements.Production.plist'
          run: |            
            dotnet publish src/Maui/MyProject.csproj -f net9.0-ios -c Release --property WarningLevel=0 -p:ArchiveOnBuild=true -p:RuntimeIdentifier=ios-arm64 -p:ApplicationId="com.myapp.app" -p:CodesignKey="Apple Distribution: My Key" -p:CodesignProvision="Distribution com.myapp.app"