June 24, 2009 14:45
I'm pretty sure that MacENC DOES show isobars and "H" and "L" if the data is included in the GRIB. The Saildocs GRIBs that one gets from within MacENC do not, as far as I know. OCENS do and you can access them from MacWX.
http://www.macwx.com/
http://www.macwx.com/