I've just spent a frustrating few hours trying to install GMT4.5.1 on my MacBook Pro with OS X 10.6. Installing gdal and netCDF were fine; but I run into problems when I try to include Matlab / Octave support. The error message is that grdinfo.mexmaci (and, I assume, all grdxxx.mexmaci) is not found. For now, I've got GMT running without the Matlab support, but I'd really like to have it. Any ideas?