Octave 3.3.54+ build on Mac OS X 10.6.6 Dec 30 2010 1. There was considerable trouble finding a working Fortran. This, it turned out, was mainly due to the fact that nothing worked reliably with -O2. After switching to -O0 it appears that most compiler choices work, but not all have been retested. The current one is: GNU Fortran (GCC) 4.2.1 (Apple Inc. build 5646). There are recent reports that better fortrans can be made to work. This should be tried. 2. There was a problem when building with /usr/local/bin ahead of /usr/bin. I got a build to complete OK by putting /usr/local/bin after /usr/bin. This proved that some executables existed in both directories and the one in /usr/local/bin was wrong. The were a number of candidates since I had first build the programs that installed in /usr/local/bin in 2007. These were either deleted or replace with up-to-date versions. 3. All installation and updating was done from one of three sources: http://www.opensource.apple.com/release/mac-os-x-1062/ http://www.gnu.org/software or from the "home" of the package. In all cases the packages were installed into /usr/local I did not make any use of Fink or MacPorts. packages mainly from