diff --git a/tools/ci_build/github/azure-pipelines/mac-ci-pipeline.yml b/tools/ci_build/github/azure-pipelines/mac-ci-pipeline.yml
index 0954611e13..068ea58256 100644
--- a/tools/ci_build/github/azure-pipelines/mac-ci-pipeline.yml
+++ b/tools/ci_build/github/azure-pipelines/mac-ci-pipeline.yml
@@ -5,8 +5,9 @@ jobs:
   steps:
     - template: templates/set-test-data-variables-step.yml
     - script: |
+        sudo python3 -m pip install numpy==1.15.0
         sudo xcode-select --switch /Applications/Xcode_10.app/Contents/Developer
-        python3 $(Build.SourcesDirectory)/tools/ci_build/build.py --use_openmp --build_dir $(Build.BinariesDirectory) --skip_submodule_sync --parallel --build_shared_lib --enable_onnx_tests --test_data_url $(TestDataUrl) --test_data_checksum $(TestDataChecksum)
+        python3 $(Build.SourcesDirectory)/tools/ci_build/build.py --use_openmp --build_dir $(Build.BinariesDirectory) --build_wheel --skip_submodule_sync --parallel --build_shared_lib --enable_onnx_tests --test_data_url $(TestDataUrl) --test_data_checksum $(TestDataChecksum)
       displayName: 'Build and Test OnnxRuntime lib for MacOS'
 
     - task: ms.vss-governance-buildtask.governance-build-task-component-detection.ComponentGovernanceComponentDetection@0