Dear Hans, I downloaded the new beta today. It installs files and makes format file well. I compiled a test file without any problem. Of course, there is a security issue of OSX, but allowing the execution in the preference>security once, it doesn't ask about again. I also run a test file containing a new graphic feature of LMTX and I got a nice output. Thanks!!! Best regards, Dalyoung P.S. Here is a beginning part of log file. I installed new beta in the folder /Users/graph/ConTeXtC/ %%%%%%%%%%%%%%% resolvers | formats | executing runner 'run luametatex format': /Users/graph/ConTeXtC/tex/texmf-osx-64/bin/luametatex --jobname="test" --fmt=/Users/graph/ConTeXtC/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.fmt --lua=/Users/graph/ConTeXtC/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.lui cont-yes.mkiv --c:autopdf --c:currentrun=1 --c:fulljobname="/Users/graph/ConTeXtC/test.tex" --c:input="/Users/graph/ConTeXtC/test.tex" --c:kindofrun=1 --c:maxnofruns=9 --c:purgeall --c:texmfbinpath="/Users/graph/ConTeXtC/tex/texmf-osx-64/bin" This is LuaMetaTeX, Version 2.03.3 open source > level 1, order 1, name 'cont-yes.mkiv' system > system > ConTeXt ver: 2019.12.06 21:40 MKIV beta fmt: 2019.12.12 int: english/english system >