OK, thanks for sharing that.

Some of the errors in the "please fix" can be ignored at the moment (e.g., the stats program ones, because on a Mac at the moment users are required to use R v3.6.*).

Installing matplotlib would greatly improve the APQC HTML, because all the line plots will look a lot nicer (and a few other things get calculated).

From these two messages:

* consider installing gcc under homebrew
* consider installing glib under homebrew

I wonder if this Xcode/Xquartz installation was successful:
... [afni.nimh.nih.gov]

If you are getting volumetric images like the ones shown in the APQC HTML, then @chauffeur_afni is able to run OK on your computer, because that is what makes those. There is no error message, so it is not clear why it wouldn't create an image for what you ran. I wonder if the netpbm installation (needed to make PNG specifically on a MAC, and the APQC HTML uses JPGs) might not have completed properly? That might also depend on the gcc and glib above. After getting those installed, can you try this step again to make sure it completes successfully:
https://afni.nimh.nih.gov/pub/dist/doc/htmldoc/background_install/install_instructs/steps_mac.html#install-netpbm

--pt