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Comment by latexr | Hacker News Reader

The uninitiated won’t notice much of a difference, and that is bound to be the point. Bash on macOS is stuck at version 3 due to licensing reasons (GPL3), while ZSH is not (MIT).

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For even more historical context, macOS originally shipped with tcsh. We've already done the shell transition once, and basically nobody noticed.

That wouldn’t have broken as much, since everyone’s scripts would have a bash or sh shebang line on top. Changing what /bin/sh points to is a much riskier change.

Is that what they've done? The linked article doesn't say that.

    $ /bin/sh --version
    GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin19)
    Copyright (C) 2007 Free Software Foundation, Inc.

You can change this by pointing /var/select/sh .

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