Even for OSX its kinda iffy as statements go. I think (been a while now) tcsh was the default for < 10.3, 10.3 was zsh and maybe 10.4, then it moved to /bin/bash as default shell.

I think it's safe to wash <= 10.3 at this point, it has less than 0.01% market share. Most stat gatherers have actually stopped tracking anything below 10.4 or 10.5.

Also, I didn't know that zsh was ever the default? I thought it switched from tcsh to bash around 10.3 or 10.4.

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.

zsh was only in I think 10.4 or 10.3, hard to tell anymore as I don't have any ppc machines to install any old os's on any longer.

Just giving historical context, not trying to say anything about markeshare or anything. Apple seems really willing to change shells is basically all my post amounts to.

It was zsh emulating csh. they messed up by not using the almquist shell like the other BSDs.