Thank you Otared and Youssef !
As you know MacOS High Sierra is the version before Catalina and works with Bash and the command I’ve given shows where I have installed context : echo 'export PATH=/Users/adeimantos/Documents/context/tex/texmf-osx-64/bin:$PATH' >> ~/.bashrc

As I am new on MacOS and since what works on Unix works nearly the same on MacOS, no matter if you install context where you want (in /Documents or in /Applications). With the command . setuptex in the folder /home/user/context/tex one could load context and its other commands like mtxrun. I don’t understand what I forget to do !
 

> Le 8 janv. 2022 à 00:00, Youssef Cherem via ntg-context <ntg-context@ntg.nl> a écrit :
> 
> The instructions for MacOS are the same as for Unix, but note that:
> 
> MacOS versions from Catalina (10.15) and newer use Zsh by default.
> MacOS versions before Catalina use Bash by default.
> https://wiki.contextgarden.net/Installation <https://wiki.contextgarden.net/Installation>
> fre. 7. jan. 2022 kl. 19:02 skrev Jean-Pierre Delange via ntg-context <ntg-context@ntg.nl <mailto:ntg-context@ntg.nl>>:
> Hello !
> Sorry for this newbie question : I’ve just uploaded CTX on my new MacOS (High Sierra), and when I pass the command mtxrun —generate or any other option with mtxrun, I get this : -bash: mtxrun: command not found
> 
> I did that before :  echo "export PATH=/Users/adeimantos/Documents/context/tex/texmf-osx-64/bin:$PATH" >> ~/.bashrc
> 
> What I am missing ?
> JP
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