message: Don't pin on macos either
diff: @@ -215,7 +215,7 @@ function install_macos_pip_deps {
  ${SUDO_CMD} ${PIP_CMD} install --upgrade setuptools==39.1.0
  ${SUDO_CMD} ${PIP_CMD} install keras_applications==1.0.8 --no-deps
  ${SUDO_CMD} ${PIP_CMD} install keras_preprocessing==1.1.0 --no-deps
  - ${SUDO_CMD} ${PIP_CMD} install --upgrade mock portpicker scipy==1.4.1 grpcio
  + ${SUDO_CMD} ${PIP_CMD} install --upgrade mock portpicker scipy grpcio
  ${SUDO_CMD} ${PIP_CMD} install six==1.12.0
  ${SUDO_CMD} ${PIP_CMD} install scikit-learn==0.20.3
  ${SUDO_CMD} ${PIP_CMD} install numpy==1.14.5
  