Hi, Amy-

What is the output of:

echo $0

?

I am going to guess it is "zsh", which for some reason is the default shell on Macs as of OS 15.*... We typically setup for either "bash" or "tcsh" shells.

If you don't have a strong preference of background shell, the simplest thing to do would probably be to change your default shell in terminals to one of the more common ones (bash or tcsh). To do so, open "System Preferences", click on "Users & Groups", click on the closed lock in the lower left of the panel (if the lock is open already, you don't need to click on it) and enter your admin/root password to unlock it, then right-click on your username in the menu in the pale that is your "current user" and select "Advanced Options...." (which should be the *only* option there). Theeeeen, in the menu of options there, go to the "Login shell" one, and change what is currently there (probably "/bin/zsh") to either "/bin/bash" or "/bin/tcsh"; your choice here doesn't matter so much-- I use "/bin/bash", other people in the group use "/bin/tcsh", and the AFNI setup instructions cover both scenarios.

After doing that, you will likely have to log out and log back in for those changes to take effect. When you open a terminal now and type "echo $0", you should see something with either "bash" or "tcsh" (depending on what you picked for your new login shell), possibly with a minus sign (fine if you do/don't see that).

Then you should be able to run

suma -update_env

and all the other fun AFNI programs; first thing to try might be to see how happy the system check is:

afni_system_check.py -check_all

and make sure everything is set well.

--pt