Howdy,

Who knows where you tried to install XeTeX. 

What does

echo $PATH

return? Did you actually try running the commands supplied by Dick Koch. 

Good Luck,
Herb Schulz

> On Nov 13, 2016, at 7:16 PM, Christian Boitet <christian.boi...@imag.fr> 
> wrote:
> 
> Good night,                                   13/11/16
> 
>>> Le 14 nov. 2016 à 00:46, Richard Koch <k...@uoregon.edu> a écrit :
>>> 
>>> 
>>> On Nov 13, 2016, at 3:35 PM, Christian Boitet <christian.boi...@imag.fr> 
>>> wrote:
>>> 
>>> G'day,                                                      13/11/16
>>> 
>>> Vielen Dank Herb für die schnelle Antwort.
>>> 
>>> Ja zur Frage.
>>> 
>>> (Ich schrieb "I reinstalled MacLive, and then MacTeX-2016, which are 
>>> supposed to come with XeTeX. No way.
>>> The message is always the same...")
>>> 
>>> Maybe I should try to uninstall all TeX-related files and reinstall, but it 
>>> is too complex to do it by hand. The installers are supposed to replace 
>>> what should be replaced, but obviously don't erase all what should be 
>>> erased.
>> 
>> 
>> Nonsense. MacTeX installs TeX Live in /usr/local/texlive/2016, which is 
>> incidentally the default location suggested by TeXLive. It would be stupid 
>> for it to erase /opt/local/bin, since it is not going to use that
>> location, and since the user might want to keep their old TeX around.
>> 
>> The MacTeX install does exactly the correct thing. It puts all of TeX Live 
>> in this one location
>> 
>>      /usr/local/texlive/2016
>> 
>> Dick Koch
>> k...@uoregon.edu
> 
> True enough:
> 
> ============================================================
> sudo find / -name 'texmf.cnf'
> ==>
> /Installeurs/XeTeX/xetex-0.9999.3/source/texk/kpathsea/texmf.cnf
> /Installeurs/XeTeX/xetex-0.9999.3/source/texk/web2c/etexdir/etrip/texmf.cnf
> /Users/boitet/Library/texmf/tex/latex/pgf_2.10.tds/doc/generic/pgf/text-en/texmf.cnf
> /usr/local/texlive/2011/texmf/web2c/texmf.cnf
> /usr/local/texlive/2011/texmf-dist/doc/generic/pgf/text-en/texmf.cnf
> /usr/local/texlive/2011/texmf-dist/doc/latex/pgfplots/texmf.cnf
> /usr/local/texlive/2011/texmf.cnf
> /usr/local/texlive/2015/texmf-dist/web2c/texmf.cnf
> /usr/local/texlive/2015/texmf.cnf
> /usr/local/texlive/2016/texmf-dist/web2c/texmf.cnf
> /usr/local/texlive/2016/texmf.cnf
> /usr/local/texlive/2016basic/texmf-dist/web2c/texmf.cnf
> /usr/local/texlive/2016basic/texmf.cnf
> ============================================================
> But, then, how comes this file (texmf.cnf) is not found when I run TeXShop in 
> mode XeTeX or XeLaTeX?
> 
> The other question is why I seem not to be able to install the latest version 
> of XeTeX "on top" of what exists.
> Perhaps it is, actually, but why does it report looking for files in 
> /opt/local when they have been installed in /usr/local ?
> 
> ==> Il will try to solve this simply, hoping the latest version of xetex is 
> contained in the latest version of MacTeX, which seems natural.
> 
> 
> I just added to my profile:
> setenv PATH "$PATH":"/usr/local/texlive/2016"
> 
> If I understand well, it should solve the problem... but it does not at the 
> moment. 
> 
> I'll update my system and restart tomorrow, perhaps that will help.
> 
> Question: is there is somewhere a PATH variable specific to TeX (some 
> PATH_TEX or TEX_PATH)?
> 
> I did not find a place in TeXShop where I could specify which instance of 
> TeXlive it should use.
> Perhaps it is still using texlive/2011 or texlive/2015?
> Tomorrow (too late now), I'll remove the older versions of TeXlive and the 
> separate folder used to try to install semtex 0.99993 separately.
> 
>  
> Best,
> Xan (@imag.fr)
> 
> 
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