How to redirect the path for ConTeXt in MacVim?

I put this in .vimrc: map <C-h> <Esc> :w <CR> :!context % <CR> and $PATH directs "context" to the right place: /Users/kitz/lmtx/tex/texmf-osx-64/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin To open the .pdf: :!open -a %r.pdf