Bart Schaefer schrieb am Di. 17. Nov. 2020 um 22:48: > On Tue, Nov 17, 2020, 1:29 PM Roman Perepelitsa < > roman.perepelitsa@gmail.com> wrote: > >> >> My guess is that you've upgraded macOS, which in turn has caused bash to >> downgrade from 5.x to 3.3. >> > > On Catalina bash is actually 3.2.57, it appears. Why on earth ... oh well. > > ksh is at least from 2012, could experiment running the pre-zsh-ized > scripts with that. > Apple can't (or rather won't) use newer bash than 3.2.57 due to licensing woes (GPL3) that's why they want users to switch to zsh and why macOS 10.15+ now use zsh by default for new users. So while I DID upgrade my main machine I doubt that Apple downgraded my bash. I'll have to try with a different machine with an older macOS to verify that on those this all behaves similar >