nathan-zhu commented on issue #5514: use pulsar get error in mac os URL: https://github.com/apache/pulsar/issues/5514#issuecomment-550982495 > pulsar-client-cpp Hi, tuteng, thanks for help. i follow your step to reinstall python3, but still get error, like below. ``` -- BUILD_TESTS: ON -- BUILD_PYTHON_WRAPPER: ON -- LINK_STATIC: OFF -- USE_LOG4CXX: OFF -- CMAKE_BUILD_TYPE: RelWithDebInfo -- PYTHON: 2.7.10 CMake Warning at /usr/local/Cellar/cmake/3.15.4/share/cmake/Modules/FindBoost.cmake:2003 (message): No header defined for python-mt; skipping header check Call Stack (most recent call first): CMakeLists.txt:143 (find_package) CMake Warning at /usr/local/Cellar/cmake/3.15.4/share/cmake/Modules/FindBoost.cmake:2003 (message): No header defined for python-py27; skipping header check Call Stack (most recent call first): CMakeLists.txt:143 (find_package) CMake Warning at /usr/local/Cellar/cmake/3.15.4/share/cmake/Modules/FindBoost.cmake:2003 (message): No header defined for python27-mt; skipping header check Call Stack (most recent call first): CMakeLists.txt:143 (find_package) CMake Error at CMakeLists.txt:151 (MESSAGE): Could not find Boost Python library -- Configuring incomplete, errors occurred! See also "/Users/lidongzhu/python/Pulsar/pulsar-branch-2.4/pulsar-client-cpp/CMakeFiles/CMakeOutput.log". ``` i use pip3 install pulsar-client==2.4.1 get successfully  but get new error at below. ``` ython 3.7.5 (default, Nov 1 2019, 02:16:32) [Clang 11.0.0 (clang-1100.0.33.8)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import pulsar Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python3.7/site-packages/pulsar/__init__.py", line 102, in <module> import _pulsar ImportError: dlopen(/usr/local/lib/python3.7/site-packages/_pulsar.cpython-37m-darwin.so, 2): Library not loaded: /usr/local/opt/protobuf/lib/libprotobuf-lite.20.dylib Referenced from: /usr/local/lib/python3.7/site-packages/_pulsar.cpython-37m-darwin.so Reason: image not found ```
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