Hi-

A couple things.

I think that Mac OS version 10.12 should still be OK to use.

The main issue is that you need to set an environment variable noted in the last section of your afni_system_check.py output (this is necessary for Macs). Could you please copy past the following in a terminal:

echo "" >> ~/.bashrc
echo "export DYLD_LIBRARY_PATH=${DYLD_LIBRARY_PATH}:/opt/X11/lib/flat_namespace" >> ~/.bashrc

echo "" >> ~/.cshrc
echo "setenv DYLD_LIBRARY_PATH /opt/X11/lib/flat_namespace" >> ~/.cshrc

That should set the variable in both your bash and tcsh shells. If you open up a new terminal, you should be able to run the @SUMA_Make_Spec_FS program. (I think probably at the moment even opening the "suma" and "afni" GUIs is probably broken on your computer, without this variable being set?)

Second, the afni_system_check.py output reports that 3dMVM fails because your R version is too old -- there is a link to the currently recommended R version number here:
[afni.nimh.nih.gov]
... and subsequent libraries that will have to be installed (the second part is slow, because of the compilation process by R, unfortunately).

--pt