This has to do with setWantsBestResolutionOpenGLSurface: not existing. Reverting the 5 or so recent commits by @mrjbq7 allows to use factor on leopard.
I don't know the mac ecosystem at all, so I don…
I assume you know about Orange http://orange.biolab.si/ . I am still in the midst of trying to get my data analysis workflow to be as lazy as possible, and like to use parts of that codebase as well. …