> On Nov 20, 2023, at 01:05, Tiago wrote:
> I am writing to inform you that I am currently stuck on version 2.3, and I am
> unsure why this is happening.
This is the one provided by the system, which is in /usr/bin/. See this by
typing 'which bison' in Terminal.
> I have tried everything, as I am using a MacOS software. Please let me know
> if you can assist me.
You need to install a later version. You also need M4.
This can be done conveniently with a package manager, like MacPorts [1] which
helps to keep programs up to date, or directly from sources [2–3].
1. https://www.macports.org/
2. https://www.gnu.org/software/bison/
3. https://www.gnu.org/software/m4/
