Unable to run on macOS when .net core 3.0 is installed

[sayedihashimi]

I'm getting an error when trying to run this on macOS. I have .net core 3.0 installed, not sure if that is causing this or not. If so, you should be able to solve with a global.json file.

This issue is for a: (mark with an x)

- [x] bug report -> please search issues before submitting
- [ ] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

1. Clone sample
2. dotnet build
3. dotnet run

OS and Version?

macOS Mojave 10.14.5

Error message on dotnet run

PS /Users/sayedhashimi/data/mycode/OSS/dotnet-core-api> dotnet build
Microsoft (R) Build Engine version 16.3.0-preview-19377-01+dd8019d9e for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Restore completed in 570.63 ms for /Users/sayedhashimi/data/mycode/OSS/dotnet-core-api/TodoApi.csproj.
  Restore completed in 859.64 ms for /Users/sayedhashimi/data/mycode/OSS/dotnet-core-api/TodoApi.csproj.
  You are using a preview version of .NET Core. See: https://aka.ms/dotnet-core-preview
  TodoApi -> /Users/sayedhashimi/data/mycode/OSS/dotnet-core-api/bin/Debug/netcoreapp2.0/TodoApi.dll

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:05.73
PS /Users/sayedhashimi/data/mycode/OSS/dotnet-core-api> dotnet run

Unhandled Exception: System.InvalidOperationException: HTTPS endpoints can only be configured using KestrelServerOptions.Listen().
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.<BindAddressAsync>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.AddressesStrategy.<BindAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.<BindAsync>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer.<StartAsync>d__21`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.<StartAsync>d__26.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Hosting.WebHostExtensions.<RunAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Hosting.WebHostExtensions.<RunAsync>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Hosting.WebHostExtensions.Run(IWebHost host)
   at TodoApi.Program.Main(String[] args) in /Users/sayedhashimi/data/mycode/OSS/dotnet-core-api/Program.cs:line 18

dotnet info

PS /Users/sayedhashimi/data/mycode/OSS/dotnet-core-api> dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   3.0.100-preview8-013656
 Commit:    8bf06ffc8d

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.14
 OS Platform: Darwin
 RID:         osx.10.14-x64
 Base Path:   /usr/local/share/dotnet/sdk/3.0.100-preview8-013656/

Host (useful for support):
  Version: 3.0.0-preview8-28405-07
  Commit:  d01b2fb7bc

.NET Core SDKs installed:
  1.1.14 [/usr/local/share/dotnet/sdk]
  2.1.2 [/usr/local/share/dotnet/sdk]
  2.1.400 [/usr/local/share/dotnet/sdk]
  2.1.700 [/usr/local/share/dotnet/sdk]
  2.2.300 [/usr/local/share/dotnet/sdk]
  3.0.100-preview8-013656 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.11 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.11 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.0.0-preview8.19405.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 1.0.16 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 1.1.13 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.3 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.11 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.0.0-preview8-28405-07 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

[sayedihashimi]

Unless I'm not understanding this correct, when Visual Studio (both Windows and Mac) release and install .NET Core 3.0 by default this sample will stop working for everyone. Is anyone looking to fix this?

[AprilPolubiec]

I'm encountering this issue. I just installed .NET Core 3.1 on Mac. dotnet run produces this error:

It was not possible to find any compatible framework version
The framework 'Microsoft.NETCore.App', version '2.0.0' was not found.
  - The following frameworks were found:
      3.1.3 at [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

You can resolve the problem by installing the specified framework and/or SDK.

The specified framework can be found at:
  - https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=2.0.0&arch=x64&rid=osx.10.14-x64

When I follow the link, there are no download options for Mac.

[UdhayarajanJ]

first you should check the project file which version is targeted.
then which version installed your machine
then you will run working fine your application