[NTG-context] Greek module problem

I recently updated to Thomas’ latest Greek module and to the system software (Mac OS 10.5.6), and am now am getting errors indicating that the .enc files are not being found. I checked cont-sys.tex and see that \autoloadmapfilestrue is set. But running “texhash” gets a “command not found” message. Any suggestions would be greatly appreciated. I am using the most recent ConTeXt minimals and Mark II on a Mac. The minimals themselves are in /Applications. Alan