Pymol fails to run on Mac

Question

[Reyhaneh]

Hi,

I have installed pymol on my Mac using:

brew install homebrew/science/pymol

when I try to run pymol I get the following error:

MP02s-iMac:$ pymol

Traceback (most recent call last):
  File "/usr/local/Cellar/pymol/1.7.6.0/libexec/lib/python2.7/site-packages/pymol/__init__.py", line 71, in <module>
    import pymol
  File "/usr/local/Cellar/pymol/1.7.6.0/libexec/lib/python2.7/site-packages/pymol/__init__.py", line 521, in <module>
    import pymol._cmd
ImportError: dlopen(/usr/local/Cellar/pymol/1.7.6.0/libexec/lib/python2.7/site-packages/pymol/_cmd.so, 2): Library not loaded: /usr/local/lib/libGLEW.1.12.0.dylib
  Referenced from: /usr/local/Cellar/pymol/1.7.6.0/libexec/lib/python2.7/site-packages/pymol/_cmd.so
 Reason: image not found

It seems I have two installation of python.

MPMAC02s-iMac:Downloads rey$ which python
/usr/local/bin/python

and

MPMAC02s-iMac:Downloads rey$ type -a python
python is /usr/local/bin/python
python is /usr/bin/python

Do you know what might be causing the problem? Setting PYMOL_PATH didn't help either.

Thanks

[Sukhi Singh]

This commit is addressing this issue. I think it should be patched up already, run
brew update

brew doctor

[Ram]

I'm seeing a weird error as well - mine is with libpng, it's loading the wrong version even when I set the DYLIB_PATH variable. I'd suggest using EduPymol's DMG for Mac.

EDIT: Solution found - I just needed to update XQuartz. XQuartz is X11 - I had no idea that was the case. If brew doctor had been telling me X11 needed an update (instead of XQuartz needs an update), I'd have done it immediately.