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I have a 2020 Mac M1 running Miniforge3-MacOSX-arm64 for Apple Silicon. I have tried pip install pystan and gets the following error

error: legacy-install-failure

× Encountered error while trying to install package. ╰─> pystan

I have also tried doing conda install pystan and gets this:

UnsatisfiableError: The following specifications were found to be incompatible with each other:

Output in format: Requested package -> Available versions

Any help is appreciated on how to get pystan running on my config.

slcao
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1 Answers1

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I ran into this same issue.

I had to ensure that the Python version was 3.8 and then I was able install the packages pystan and prophet with conda instead of pip.

conda create python==3.8 -n your_environment_name

conda install pystan==2.19.1.1

Matt K
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