Issue with MSBuildLocator.RegisterDefaults() on Mac M1

[sergey-fuflygin]

I am encountering an issue on my Mac M1 when calling MSBuildLocator.RegisterDefaults(). The following error is produced:

No .NET SDKs were found.

Download a .NET SDK:
https://aka.ms/dotnet/download

Learn about SDK resolution:
https://aka.ms/dotnet/sdk-not-found
Unhandled exception. System.InvalidOperationException: Failed to find all versions of .NET Core MSBuild. Call to hostfxr_resolve_sdk2. There may be more details in stderr.
   at Microsoft.Build.Locator.DotNetSdkLocationHelper.GetSdkFromGlobalSettings(String workingDirectory)
   at Microsoft.Build.Locator.DotNetSdkLocationHelper.GetDotNetBasePaths(String workingDirectory)+MoveNext()
   at Microsoft.Build.Locator.DotNetSdkLocationHelper.GetInstances(String workingDirectory, Boolean allowQueryAllRuntimes)+MoveNext()
   at Microsoft.Build.Locator.MSBuildLocator.GetInstances(VisualStudioInstanceQueryOptions options)+MoveNext()
   at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Boolean& found)
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at Microsoft.Build.Locator.MSBuildLocator.RegisterDefaults()

dotnet --info output is below

.NET SDK:
 Version:           8.0.303
 Commit:            29ab8e3268
 Workload version:  8.0.300-manifests.c915c39d
 MSBuild version:   17.10.4+10fbfbf2e

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  14.5
 OS Platform: Darwin
 RID:         osx-arm64
 Base Path:   /usr/local/share/dotnet/sdk/8.0.303/

.NET workloads installed:
There are no installed workloads to display.

Host:
  Version:      8.0.7
  Architecture: arm64
  Commit:       2aade6beb0

.NET SDKs installed:
  6.0.424 [/usr/local/share/dotnet/sdk]
  8.0.303 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 6.0.32 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 8.0.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 6.0.32 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 8.0.7 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

The above causes .NET Upgrade Assistant to fail (comment).

Could you please guide me on resolving this issue or any additional troubleshooting steps? Your help would be greatly appreciated.

[YuliiaKovalova]

Hi @sergey-fuflygin,

Thank you for contacting us! According to the specified info, it looks like PATH environment variables doesn't contain the required info to help with sdk resolution. Please add path/usr/local/share/dotnet to PATH env variable and try again.

[sergey-fuflygin]

Hi @YuliiaKovalova,

Thank you for the quick response!

I added /usr/local/share/dotnet to the PATH environment variable as you suggested, and it resolved the issue. I’m no longer receiving any errors.

Here is the output of echo $PATH:

sergey.fuflygin@sergey ~ % echo $PATH                              
/usr/local/share/dotnet:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/share/dotnet/sdk:/usr/local/share/dotnet/sdk/8.0.303/:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/usr/local/share/dotnet:~/.dotnet/tools:/usr/local/sbin:/Applications/Postgres.app/Contents/Versions/latest/bin:/Users/sergey.fuflygin/.dotnet/tools                        

Thanks again for your help!

[baronfel]

@sergey-fuflygin do you remember how you installed the .NET SDK? All of our installers should be setting $PATH for you automatically, so failures like this make me a bit worried.

[sergey-fuflygin]

@baronfel I likely downloaded the installer from https://dotnet.microsoft.com/en-us/download/dotnet/8.0, but to be honest, I don’t remember the exact steps I took.

If you want me to try uninstalling it and installing it again, please share the recommended steps, and I will do that. I’m ready to investigate this issue deeper to help identify the root cause.