The latest beta (Minimals) fails to compile and complains:
This is pdfTeX, Version 3.1415926-1.40.10 (Web2C 7.5.7)
  \write18 enabled.
  (/Applications/ConTeXtMinimals/tex/texmf-context/web2c/natural.tcx)
I can't find the format file `cont-en.fmt'!
and
context --version
gets
MTXrun | unknown script 'context.lua' or 'mtx-context.lua'

Alan