you're right, that works fine, thanks.
Yep - so does Acrobat if you have it.
no idea why apple preview won't just open .ps files any more, I thought that used to work.
As Henry once so wisely observed: "4.2BSD is just like UNIX, only different."
DEC lived, and, I guess, eventually died, by "The Promise" - that old things kept working on newer releases. Be it VMS, Ultrix, Tru64 or whatever. Maybe not easily, maybe not fast, But they worked. If you were "inside" it, was very difficult to remove an old feature. It may also be that DEC and the like cared about the ISVs and the promise was for more that the end user. Modern systems (to be fair, even penguins) don't seem to care as much about that idea. The license to "improve" something or "deprecate" old behavior is based on a Greek hubris that was taught to many over the years. Apple and Microsoft often seem to have always had a few extra helpings. It seems silly to me, too.
BTW: ps2pdf is using ghostscript under the covers, so you should have been able to call it directly. In "brew" pstools kits which ps2df is part, requires it and thus ensures it is installed.