Question: I am experiencing an issue with installing lighgbm on Apple Silicon, the full installation process is as follows: python3 -m pip install lightgbm Defaulting to user installation because normal site-packages is not writeable Collecting lightgbm Using cached lightgbm-4.1.0.tar.gz (1.7 MB) Installing build dependencies ... done Getting requirements to build wheel ... done Installing backend dependencies ... done Preparing metadata (pyproject.toml) ... done Requirement already satisfied: numpy in ./Library/Python/3.11/lib/python/site-packages (from lightgbm) (1.23.5) Requirement already satisfied: scipy in ./Library/Python/3.11/lib/python/site-packages (from lightgbm) (1.10.1) Building wheels for collected packages: lightgbm Building wheel for lightgbm (pyproject.toml) ... error error: subprocess-exited-with-error × Building wheel for lightgbm (pyproject.toml) did not run successfully. │ exit code: 1 ╰─> [45 lines of output] 2023-11-02 14:58:09,352 - scikit_build_core - INFO - CMake version: 3.27.7 *** scikit-build-core 0.6.0 using CMake 3.27.7 (wheel) 2023-11-02 14:58:09,356 - scikit_build_core - INFO - Build directory: /private/var/folders/7t/ys9t4mvn1fx74wckbywxd2sw0000gp/T/tmptyogi8su/build *** Configuring CMake... 2023-11-02 14:58:09,372 - scikit_build_core - INFO - Ninja version: 1.11.1 2023-11-02 14:58:09,372 - scikit_build_core - WARNING - libdir/ldlibrary: /Library/Frameworks/Python.framework/Versions/3.11/lib/Python.framework/Versions/3.11/Python is not a real file! loading initial cache file /var/folders/7t/ys9t4mvn1fx74wckbywxd2sw0000gp/T/tmptyogi8su/build/CMakeInit.txt CMake Deprecation Warning at CMakeLists.txt:35 (cmake_minimum_required): Compatibility with CMake < 3.5 will be removed from a future version of CMake. Update the VERSION argument <min> value or use a ...<max> suffix to tell CMake that the project does not need compatibility with older versions. -- The C compiler identification is AppleClang 15.0.0.15000040 -- The CXX compiler identification is AppleClang 15.0.0.15000040 -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc - skipped -- Detecting C compile features -- Detecting C compile features - done -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done -- Could NOT find OpenMP_C (missing: OpenMP_C_FLAGS OpenMP_C_LIB_NAMES) -- Could NOT find OpenMP_CXX (missing: OpenMP_CXX_FLAGS OpenMP_CXX_LIB_NAMES) -- Could NOT find OpenMP (missing: OpenMP_C_FOUND OpenMP_CXX_FOUND) -- Found OpenMP_C: -Xpreprocessor -fopenmp -I/include -- Found OpenMP_CXX: -Xpreprocessor -fopenmp -I/include -- Found OpenMP: TRUE -- Performing Test MM_PREFETCH -- Performing Test MM_PREFETCH - Failed -- Performing Test MM_MALLOC -- Performing Test MM_MALLOC - Success -- Using _mm_malloc -- Configuring done (9.3s) -- Generating done (0.0s) -- Build files have been written to: /var/folders/7t/ys9t4mvn1fx74wckbywxd2sw0000gp/T/tmptyogi8su/build *** Building project with Ninja... ninja: error: '/lib/libomp.dylib', needed by '/private/var/folders/7t/ys9t4mvn1fx74wckbywxd2sw0000gp/T/pip-install-zb1bf93d/lightgbm_d399d75f04b14379ba9d10c8bffd1542/lib_lightgbm.so', missing and no known rule to make it *** CMake build failed [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. ERROR: Failed building wheel for lightgbm Failed to build lightgbm ERROR: Could not build wheels for lightgbm, which is required to install pyproject.toml-based projects  as I understand I need to have libomp before installing lightgbm. However, I already have it installed and I still continue to experience the same issue. Is it related to the directories being different than where it is supposed to be? How can I check what the issue is? brew install libomp ==> Downloading https://formulae.brew.sh/api/formula.jws.json #=#=- # # #=O#- # # -#O=- # # # -=O#- # # # -=O=-# # # # -=O=- # # # # -=O=- # # # # ######################################################################################################################################################################################################################################################### 100.0% ==> Downloading https://formulae.brew.sh/api/cask.jws.json ######################################################################################################################################################################################################################################################### 100.0% Warning: libomp 17.0.4 is already installed and up-to-date. To reinstall 17.0.4, run: brew reinstall libomp  Thank you for your time.

Answer: I found the solution, basically I deleted the python that was installed and installed the python with homebrew then everything worked.