Hey, this worked now : )

Only context test.tex still does not work. However, the error message changed (see below).

Never mind, I appreciate all the effort you already put into this, overall in general and for debugging today in particular.
Will try to learn some lua debugging.

Burak-Emirs-MacBook-Pro:/tmp/testlua.a buraq$ context test.tex
MtxRun | loading configuration for /usr/local/context/tex/texmf/web2c from /Users/buraq/luatex-cache/context/f70b0d481875d119766efabfbdb61af7/trees/01ff2a12d1aaf66ed1ecab879ab73b31
...ex/texmf-context/scripts/context/lua/mtx-context.lua:563: attempt to index local 'ctxdata' (a nil value)
 
Burak