Dear Dalyoung, dear Mikael,

I installed anew the whole LMTX tree and now everything is working fine. 
I don’t know whether this is related or not, somehow in my previous tree I had a directory (or folder in the MacOS language) named « texmf-osx-64 » instead « texmf-osx-arm64 » and this apparently had consequences.

In any case everything works fine now.

Thanks to Hans, Mikael and all the people on this list!

Best regards: Otared

> On 18 Jan 2024, at 08:17, Jeong Dal via ntg-context <ntg-context@ntg.nl> wrote:
> 
> Dear Otared,
> 
> I installed upload version today.
> And, your example,
> 
> \starttext
> The derivative of $f$ is denoted $f'$ or $f^\prime$ or is it $f^'$\dots
> \stoptext
> 
> works well.
> 
> I think that you will have the same good result.
> 
> Best wishes,
> 
> Dalyoung
> 
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Otared Kavian
e-mail: otared@gmail.com
Phone: +33 6 88 26 70 95