Yes.
useradd $OPENACS_SERVICE_NAME
groupadd web
from https://openacs.org/doc/current/openacs.html
is already done for mac users with:
sudo niutil -create / /users/$OPENACS_SERVICE_NAME
sudo niutil -createprop / /users/$OPENACS_SERVICE_NAME gid 201
sudo niutil -createprop / /users/$OPENACS_SERVICE_NAME uid 201
on this page:
https://openacs.org/doc/current/postgres.html