Cannot find open blas on MAC OSX

[maljoras]

In case someone has this error message when using brew trying to install aihwkit version 1.0 on MAC OSX

     -- OpenMP could not be found. Disabling OpenMP support.
      -- The BLAS backend of choice:OpenBLAS
      -- Could not find OpenBLAS include. Turning OpenBLAS_FOUND off
      -- Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off
      CMake Error at cmake/Modules/FindOpenBLAS.cmake:79 (MESSAGE):
        Could not find OpenBLAS
      Call Stack (most recent call first):
        cmake/dependencies.cmake:50 (find_package)
        CMakeLists.txt:42 (include)

One can solve it with

brew install openblas
OpenBLAS_ROOT="$(brew --prefix openblas)" pip install aihwkit