Web Application build error with net6.0 framework, Failed to sign apphost with error code 0

Web Application build error with net6.0 framework.

I am working on MAC and dotnet core 3.1, 5.0 and 6.0 versions are installed on my machine. I not able to build Web Application on my machine due to shared error in this ticket.

I can build web application in target framework net5.0 but not with net6.0 and console, class library projects’ build successfully. I tried to build using command line, VS 2022/2019 but no success.

Project file code as below and this is empty Web API project.

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

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.1.5" />
  </ItemGroup>

</Project>

To Reproduce

Exceptions (if any)

/usr/local/share/dotnet/sdk/6.0.100-rc.2.21505.57/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets(5,5): Error NETSDK1177: Failed to sign apphost with error code 0: /Users/ajandersingh/Projects/WebAppTest/WebAppTest/obj/Debug/net6.0/apphost: is already signed (NETSDK1177) (WebAppTest)

Further technical details

• Include the output of dotnet --info
• VS 2022 Preview and VS 2019

Please assist to resolve code build error. I apologies if I have posted issue is not relevant to reported category

[shockliang]

sudo xcode-select -r fixing the issue for me…

[iHaveBecomeDeath]

I had this problem today, where it failed to sign apphost since it is already signed. It resolved itself and disappeared once I had installed the latest .Net SDK (6.0.202).

I started by trying out the other suggestions, with xcode etc, but this fixed in the end.