I was able to get rid of this error by installing a new version of a Framework build for libpng from
I also switched to using the non homebrew version which I installed from source using "python setup.py install".
Now I can get the pymol window to show up and also import pymol inside python scripts without any error.
But as expected I cannot get the external GUI to work.
I tried installing Pmw and it complains about "tkinter" . Once I force it to use the Tkinter as tkinter
sys.modules["tkinter"] = Tkinter
Then the Pmw window does not show up and crashes.
These are all old issues I am sure and I am hoping there is an easy fix.
Sorry for using a 32 bit OSX machine running 10.6.8..but I recently resurrected it with a SSD and it actually runs faster than my Ubuntu Linux machine running 13.04.