[OS X TeX] Package xparse Error: Support package l3kernel too old..

[Yvon Thoraval]

Hey all,

with the following simple case :
--------------------------------------------------------------------------------
\documentclass[a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage{fontspec}
\usepackage{xunicode}
\usepackage[frenchb]{babel}

\begin{document}
Toto
\end{document}
--------------------------------------------------------------------------------

Using XeLaTeX like that :
$ xelatex <my file>

I get the following error(s) :
$xelatex enveloppe-peau-p-208-ecm2.tex
This is XeTeX, Version 3.1415926-2.3-0.9997.5 (TeX Live 2011)
 restricted \write18 enabled.
entering extended mode
(./enveloppe-peau-p-208-ecm2.tex
LaTeX2e <2011/06/27>
Babel <v3.8m> and hyphenation patterns for english, dumylang,
nohyphenation, ge
rman-x-2011-07-01, ngerman-x-2011-07-01, afrikaans, ancientgreek, ibycus,
arabi
c, armenian, basque, bulgarian, catalan, pinyin, coptic, croatian, czech,
danis
h, dutch, ukenglish, usenglishmax, esperanto, estonian, ethiopic, farsi,
finnis
h, french, friulan, galician, german, ngerman, swissgerman, monogreek,
greek, h
ungarian, icelandic, assamese, bengali, gujarati, hindi, kannada,
malayalam, ma
rathi, oriya, panjabi, tamil, telugu, indonesian, interlingua, irish,
italian,
kurmanji, lao, latin, latvian, lithuanian, mongolian, mongolianlmc, bokmal,
nyn
orsk, polish, portuguese, romanian, romansh, russian, sanskrit, serbian,
serbia
nc, slovak, slovenian, spanish, swedish, turkish, turkmen, ukrainian,
uppersorb
ian, welsh, loaded.
(/usr/local/texlive/2011/texmf-dist/tex/latex/base/article.cls
Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
(/usr/local/texlive/2011/texmf-dist/tex/latex/base/size10.clo))
(/usr/local/texlive/2011/texmf-dist/tex/latex/base/fontenc.sty
(/usr/local/texlive/2011/texmf-dist/tex/latex/base/t1enc.def))
(/usr/local/texlive/2011/texmf-dist/tex/latex/fontspec/fontspec.sty
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/expl3.sty
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3names.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/etex-pkg/etex.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3basics.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3expan.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3tl.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3int.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3quark.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3seq.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3toks.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3prg.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3clist.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3token.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3prop.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3msg.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3io.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3skip.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3box.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3keyval.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3keys.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3precom.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3xref.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3file.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3fp.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/expl3/l3luatex.sty)
(/usr/local/texlive/2011/texmf-dist/tex/latex/tools/calc.sty))

LaTeX Warning: You have requested, on input line 20, version
               `2011/09/05' of package expl3,
               but only version
               `2011/04/09 v2222 L3 Experimental code bundle wrapper'
               is available.

(/usr/local/texlive/2011/texmf-dist/tex/latex/l3packages/xparse/xparse.sty

LaTeX Warning: You have requested, on input line 53, version
               `2012/04/23' of package expl3,
               but only version
               `2011/04/09 v2222 L3 Experimental code bundle wrapper'
               is available.


! Package xparse Error: Support package l3kernel too old..

See the xparse package documentation for explanation.
Type  H <return>  for immediate help.
 ...

l.64   }

? H
 Please install an up to date version of l3kernel using your TeX package
manage
r or from CTAN.\\ \\ Loading xparse will abort!
? X
No pages of output.
Transcript written on enveloppe-peau-p-208-ecm2.log.


I'm running the latest MacTeX with TeXLive 2011, i should mention that
exactly the same*.tex file gave me a goo result on Ubuntu 12.04 running
TeXLive 2009.
On mac the error message says "Package xparse Error: Support package
l3kernel too old" why ?
How to get out on this stuck ?
I do have googlise this bug is mention to be solved early 2011 ?

Bets,

YT
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