Hi I have been the one who made the binary installers for the power pc version of horae. I have yet to build the intel version as I don't have access at work to an intel based mac (I did try a little on my wife's new imac, but ran into the same problem you did). I will be getting a new Mac Pro machine shortly and would like to give it a try there. The problem with gcc3 and ggc4 is something I am aware about too. One thing I had started to try using was g95 and/or gfortran, the gcc 4 fortran compilers (g95 standard fortran). The automatic build sequence is broken for these, hence on the powerpc, I took the easy way out and compiled the binary installer with gcc3 (which I also have). I also hope to buy another compiler for the new mac as well (perhaps Intel?). I would be interested in helping and would be most grateful to be kept up to date as making a binary installer would help out a lot of other users as well. Paul Fons