What are these two methods / primitives supposed to return? Under OSX StackVM StackInterpreter VMMaker-oscog-EstebanLorenzano.139 I get the following: Smalltalk vmFullPath '/Applications/StackVM.app' Smalltalk vmPath '/Applications/StackVM.app/' according to the comments I should get the following Smalltalk vmFullPath '/Applications/StackVM.app/Contents/MacOS/StackVM' Smalltalk vmPath '/Applications/' or as well the quirky '/Applications/StackVM.app/Contents/MacOS/' As far as we understand vmPath should be the place where you go and look for the PharoV10.sources file, meaning the second option does not make a lot of sense here... best cami + damien