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Xamarin.Forms: No valid iOS code signing keys found in keychain

Yesterday while creating a new Xamarin.Forms application,  it failed to build for iOS with the following error message:

No valid iOS code signing keys found in keychain

I first thought that there was something wrong with my iOS configuration, but when I tried to create a ‘traditional’ iOS application, it just worked.

On the Xamarin forums I found the following solution that worked for me:

  • Open your Xamarin.Forms projects.
  • Unload the iOS project in Visual Studio.
  • Open the csproj file and search for the following element

<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhoneSimulator' ">
    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
</PropertyGroup>

  • Remove ‘Entitlements.plist’ from the ‘CodesignEntitlements’ 
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhoneSimulator' ">
    <CodesignEntitlements></CodesignEntitlements>
</PropertyGroup>
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