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The python distribution in the 7.4.1 release cannot run all the python based tools on a Silicon Mac (M1, M2, M3 chip) because at that time we did not have a python distribution that was completely compatible with the arm64 architecture.

We currently have a development build for the Silicon Mac, and you can download/try the installer package from:

https://surfer.nmr.mgh.harvard.edu/pub/dist/freesurfer/dev/freesurfer-macOS-darwin_arm64-dev.pkg

But we cannot recommend this build for ongoing work as it is currently unstable and not a tested release..

- R.

On Feb 7, 2024, at 17:05, Martin Juneja <mj70481@gmail.com> wrote:

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Dear Juan and FreeSurfer developers,

I am trying to run the mri_synthsr command on a MacPro M2 Max chip (OS 13.6.4) - but somehow, I am getting the following error when I try to run this command. I am using FreeSurfer's 7.4.1 version.

Illegal instruction: 4

I would greatly appreciate any help in getting this resolved.


Thanks.
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