Hi, I have made a little progress understanding and getting Ken McIvor's iXAFS build scripts to run on my Macbook Pro. I have not yet tackled a full 64-bit version, but have managed to get it to compile ifeffit 1.2.11c and everything up to horae, including Tk and PGPLOT. I could not get horae-066 to build from source, but did not pursue this in detail, as it is not the goal. I could also not get horae-070 to build cleanly from source, but I now believe that to not be a Mac-specific problem, but that horae-070.tar.gz is simply broken for building on clean machines. I will try the svn version today, and try to alter Ken's build script for the new horae build system. As I was looking at this, I also noticed several oddities in the layout, and will try to improve these (make them more like the Unix and Windows layouts). That is, iXAFS.app/Contents/Resources/Horae/lib/perl5 should become iXAFS.app/Contents/Library/perl5 and iXAFS.app/Contents/Resources/Horae/share/ifeffit should become iXAFS.app/Contents/Library/ifeffit I will also try to add the python module directly to iXAFS.app. I don't know what the best approach for making a Mac-specific updater is, as the updaters we've done in the past are fully encapsulated binaries. It is also definitely worth considering packaging an entire perl distribution under iXAFS.app. --Matt