Has anybody had any luck getting the tools in the QGIS2 Toolbox to run? So far I have tried SAGA and TauDEM but both throw up errors. I eventually got TauDEM to produce something from the D8 tool by feeding it empty rasters to fill but the results were complete nonsense. Outputting to temporary files did not help at all. It's probably yet another path issue, GIS on OSX seems to be one long series of path issues.
I just updated the macports Qgis 2.0.1 so that it works with macports Saga port. It's a matter of adding some info in the Info.plist for Qgis to figure out the right path to the other utilities. Grass is still lurching, but I hope to make it work in a matter of a few days.