Dear Otared, Thank you for your mail. Since there is no echo at all on this matter for a few days, I think that I am the only person who has the installation problem. I tired in many ways. I repeated the installation process three times from the scratch. But I have no progress at all. I made ".luatex"(it is described by Thomas in ntg-context digest vol 39, issue 30), and got the following result. there is a little difference. luatools tried to load texmf.cnf but face to an error soon. %%%%%%%% dalyoung$ source ~/.luatex dalyoung$ luatools --generate LuaTools | skipping /usr/local/texlive/2007/bin/powerpc-darwin/texmf.cnf LuaTools | skipping /usr/local/texlive/2007/bin/powerpc-darwin/share/ texmf-local/web2c/texmf.cnf ... LuaTools | skipping /usr/local/texlive/2007/bin/texmf.cnf LuaTools | skipping /usr/local/texlive/2007/bin/texmf/web2c/texmf.cnf LuaTools | skipping /usr/local/texlive/2007/texmf.cnf LuaTools | loading /usr/local/texlive/2007/texmf/web2c/texmf.cnf LuaTools | skipping /./texmf.cnfError in lua file loading: /usr/ texbin/luatools:1108: bad argument #1 to 'sum' (string expected, got table) %%%%%%%%%%%%%%%%%%% As you see, the output of luatools --variables also gave the same output. ~ dalyoung$ luatools --variables Error in lua file loading: /usr/texbin/luatools:1108: bad argument #1 to 'sum' (string expected, got table) ~ dalyoung$ luatools --show-path Error in lua file loading: /usr/texbin/luatools:1108: bad argument #1 to 'sum' (string expected, got table) %%%%%%%%%%%%%%%%%%% There may be something that is unknown to us in our system. For information, I use mac G5(OSX 10.4.10, PPC) and installed MacTeX 2007 version. That is all that I can say right now. If you have anything good, please let me know. Thank you for your concern. best regards, Dalyoung