I downloaded and installed wxPython2.6-osx-ansi-2.6.1.0-macosx10.3-py2.3.dmg on my Mac running OSX 10.3.9. MacPython is already installed. When I tried running the program with python pyMPW.py the text "This program needs access to the screen. Please run with 'pythonw', not 'python', and only when you are logged in on the main display of your Mac." was displayed, so I did that. I let the program open a simple cr2-file with materials in Poser 4-style. When I clicked the "Create MAT" button the terminal displayed the following: Traceback (most recent call last): File "pyMPE.py", line 243, in OnButton make_mat(self.node) File "pyMPE.py", line 922, in make_mat figure.remove_children([['material', 0]], inverse=True) File "pyMPE.py", line 321, in remove_children for child in reversed(self.children): NameError: global name 'reversed' is not defined Then I restarted the program and tried the button "Convert to P5". This time I didn't get any error messages but the menu "Save as " was greyed out. python -v reports (among many other things) Python 2.3 (#1, Sep 13 2003, 00:49:11)