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How to run a .NET Core 3.1 single-file app on MacOS?

I have an application in .NET Core 3.1.200 with this PublishProfile for targeting osx-x64:

<?xml version="1.0" encoding="utf-8"?>
<!--
https://go.microsoft.com/fwlink/?LinkID=208121. 
-->
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <PublishProtocol>FileSystem</PublishProtocol>
    <Configuration>Release</Configuration>
    <Platform>Any CPU</Platform>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <PublishDir>bin\Release\netcoreapp3.1\publish\</PublishDir>
    <RuntimeIdentifier>osx-x64</RuntimeIdentifier>
    <SelfContained>true</SelfContained>
    <PublishSingleFile>True</PublishSingleFile>
    <PublishReadyToRun>False</PublishReadyToRun>
    <PublishTrimmed>False</PublishTrimmed>
  </PropertyGroup>
</Project>

I've run dotnet publish myapp.cproj /p:PublishProfile=profile.xml and at the end the /publish folder contains a single file "myapp" (this is correct since PublishSingleFile=True).

But it has no extension. How do I run it on MacOS?

EDIT: I've discovered I can simply run it from Terminal with ./myapp. But how to run it by double-clicking on Finder? For now, it shows:

enter image description here

Solution

  • .NET Core based applications (with user interface) must be packaged up as application bundle, so as to be recognized by Finder properly.

    It is a lengthy process, but Avalonia guys wrote an article with detailed steps,

    https://docs.avaloniaui.net/docs/distribution-publishing/macos

    You can use dotnet-bundle tool to automate most of them.