How to install SciPy on Apple Silicon (ARM / M1)

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It’s possible to install on regular arm64 brew python, you need to compile it yourself.

If numpy is already installed (from wheels) you’ll need to uninstall it:

pip3 uninstall -y numpy pythran

I had to compile numpy, which requires cython and pybind11:

pip3 install cython pybind11

Then numpy can be compiled:

pip3 install --no-binary :all: --no-use-pep517 numpy

Scipy needs pythran (this should happen after installing numpy):

pip3 install pythran

Then we need to compile scipy itself, it depends on fortran and BLAS/LACK:

brew install openblas gfortran

Tell scipy where it can find this library:

export OPENBLAS=/opt/homebrew/opt/openblas/lib/

Then finally compilescipy:

pip3 install --no-binary :all: --no-use-pep517 scipy

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