afni.nimh.nih.gov

I am not quite sure what to make of this. I have the same version
of tar here, and the options are fine. And your .tgz package has
the same size of what is on the web site. What happens when you
run it directly (since maybe tcsh points you to a different version)?

cd abin/.tmp.install
tar xfz macos_10.12_local.tgz

- rick