FYI, The version of clang that ships with Xcode can compile openMP code if you provide the right compiler flags. You have to provide libomp.dylib and a few he

FYI, The version of clang that ships with Xcode can compile openMP code if you provide the right compiler flags. You have to provide libomp.dylib and a few header files, but the folks that run R compile it and provide it for distribution (they need it). If you trust R, you can probably trust this too: https://mac.r-project.org/openmp/ https://mac.r-project.org/openmp/