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Hi John, Our problem with providing binaries for Mac OS X is mainly due to the lack of a single widely used Fortran compiler for Mac users, since no Fortran compiler comes with Mac OS X. We don't currently have access to the Absoft compilers on Macs, due to expense. However, the instructions for building on a Mac are basically the same as for any other Unix system, and we test netCDF on the latest version of Mac OS X. For example, here's the complete output from successful builds from source on a Mac OS X 10.5.6 system using g95 for Fortran of the latest release, netCDF 4.0.1: http://www.unidata.ucar.edu/software/netcdf/builds/4_0_1/out_mort_2009033010_0_0.txt (default netCDF-3 build) http://www.unidata.ucar.edu/software/netcdf/builds/4_0_1/out_mort_2009033010_0_1.txt (netCDF-4, using --enable-netcdf-4) The above was built with no special environment variable settings, except FC=g95, and just used the standard build from source sequence of ./configure make check sudo make install If you want the netCDF-4 enhanced data model and features, you have to first build and install HDF5 and run ./configure --enable-netcdf-4 --with-hdf5=/location/of/hdf5 make check sudo make install I actually have a Mac laptop on my desk that I use as a second computer to my Solaris x86 development machine, so I'm all in favor of netCDF on Apple platforms! --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: AJI-287433 Department: Support netCDF Priority: Normal Status: Closed