@davehelmuth, I'm interested in your last point: "Using conda install numpy when running mysvd.py is now done in 1.51 seconds". I received my M1 Max yesterday and freshly installed Python 3.9 and numpy via miniforge, but mysvd.py takes longer than 4 seconds for me. So I can't reproduce your claim, though I'd like to!

Perhaps you had this in mind? https://github.com/conda-forge/numpy-feedstock/issues/253 Indeed, running conda install numpy "libblas=*=*accelerate" worked for me!