So I have an old copy of Mac OS X for Unix Geeks here. 10.2 was tcsh, 10.3 was tcsh for user shells and /bin/sh for scripts. I think 10.4 was the zsh experime

So I have an old copy of Mac OS X for Unix Geeks here. 10.2 was tcsh, 10.3 was tcsh for user shells and /bin/sh for scripts. I think 10.4 was the zsh experiment, then 10.5+ bash. We'll see how long bash lasts being a gpl shell.