let g:context_mtxrun = 'PATH=$HOME/Applications/ConTeXt-Beta/tex/texmf-osx-64/bin:$PATH mtxrun'
You may To enable synctex by setting , use <tt>g:context_synctex</tt> to <tt>1</tt> (the default is <tt>0\setupsynctex[state=start]</tt>): let g:context_synctex = 1in your document.
You may pass <tt>mtxrun</tt> additional options by putting them in <tt>g:context_extra_options</tt>.