1/ When I open a document like cv.lyx I have the message " document use an unknow text class -- substituting default" and "the document use a missing class cv lyxx will not be able to produce output"
Futhermore cv.cls is in Lyx.app/content/ressources/lyx/tex
Look at LyX -> Help -> Latex Configuration. Under "CV" the document explains that the class file needs to be installed in your teTeX hierarchy. Run texhash after you install it.
2/ when i want to do a export in pdf or postscript, I have the message "no information to export to pdf"
Run
/Applications/LyX.app/Contents/MacOS/LyX -dbg latex
in a terminal and watch the output to check your teTeX installation and configuration.
--
Ronald Florence www.18james.com
