I am having some issues after installing pymol in Mac OS 10.8.2. It seems
    the program is installed but when I try to open in using command line
    "pymol" it doesn't show the 'Molecular Graphics System' window but shows
    only the 'Pymol Viewer' window. In the terminal I have the following error

     Detected OpenGL version 2.0 or greater. Shaders available.
     Detected GLSL version 1.20.
     OpenGL graphics engine:
      GL_VENDOR: NVIDIA Corporation
      GL_RENDERER: NVIDIA GeForce GT 640M OpenGL Engine
      GL_VERSION: 2.1 NVIDIA-8.10.44 304.10.65f03
    Traceback (most recent call last):
      File "/Library/Python/2.7/site-packages/pymol/__init__.py", line 450, in
      File "/Library/Python/2.7/site-packages/pmg_tk/__init__.py", line 22, in
        from PMGApp import *
      File "/Library/Python/2.7/site-packages/pmg_tk/PMGApp.py", line 33, in
        class PMGApp(Pmw.MegaWidget):
      File "/Library/Python/2.7/site-packages/Pmw/Pmw_2_0_0/lib/PmwLoader.py",

- Ignored:
    line 131, in __getattr__
      File "/Library/Python/2.7/site-packages/Pmw/Pmw_2_0_0/lib/PmwLoader.py",
    line 89, in _initialise
        raise ImportError(msg)
    ImportError: No module named tkinter
     Detected 4 CPU cores.  Enabled multithreaded rendering.

    Any help to resolve this issue would be greatly appreciated. Thanks


Rhitankar Pal
Postdoctoral Researcher,
Dept of Chemistry, Yale University
New Haven, CT 06511