diff --git a/tools/ci_build/github/azure-pipelines/nuget/templates/test_macos.yml b/tools/ci_build/github/azure-pipelines/nuget/templates/test_macos.yml
index 0703f6afa3..b3254e3c62 100644
--- a/tools/ci_build/github/azure-pipelines/nuget/templates/test_macos.yml
+++ b/tools/ci_build/github/azure-pipelines/nuget/templates/test_macos.yml
@@ -35,6 +35,7 @@ jobs:
       packageFolder: '$(Build.BinariesDirectory)/nuget-artifact'
 
   - script: |
+     brew install libomp
      $(Build.SourcesDirectory)/csharp/test/Microsoft.ML.OnnxRuntime.EndToEndTests/runtest.sh \
                $(Build.BinariesDirectory)/nuget-artifact \
                $(Build.SourcesDirectory) \