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Use Accelerate for BLAS/LAPACK on Apple Silicon #75

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Merged
krystophny merged 1 commit into from
Oct 23, 2026
Merged

Use Accelerate for BLAS/LAPACK on Apple Silicon #75

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9 changes: 7 additions & 2 deletions activate.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -25,8 +25,13 @@ if [ "$(uname)" = "Darwin" ]; then
# Check the processor type
if [ "$(uname -m)" = "arm64" ]; then
echo "This is an Apple Silicon Mac."
export BLAS_LIBRARIES=/opt/homebrew/opt/openblas/lib/libopenblas.dylib
export LAPACK_LIBRARIES=/opt/homebrew/opt/openblas/lib/liblapack.dylib
# Accelerate, not Homebrew OpenBLAS: OpenBLAS is built with LLVM libomp
# while gfortran uses libgomp, and OpenBLAS 0.3.31-0.3.33 gave wrong
# DGEMM results when called from gfortran OpenMP threads
# (OpenMathLib/OpenBLAS#5825). One OpenMP runtime per process.
export BLAS_LIBRARIES=/System/Library/Frameworks/Accelerate.framework
export LAPACK_LIBRARIES=/System/Library/Frameworks/Accelerate.framework
export BLA_VENDOR=Apple
elif [ "$(uname -m)" = "x86_64" ]; then
echo "This is an Intel Mac."
export BLAS_LIBRARIES=/usr/local/opt/openblas/lib/libopenblas.dylib
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