Dear Hans, It says nothing. %%%%%%%%%%%%%%%% dalyoung$ luatools --variables dalyoung$ %%%%%%%%%%%%%%%%% Just blank lines for other options, like --expansions, -- configurations, --show-path, etc. I copied /texmf-local/scripts/context/lua/luatools.lua to /usr/texbin/ luatools. If there is nothing wrong, I'll try once more after reinstalling MacTeX again. Thank you Best regards, Dalyoung