fiddler fiddler - 5 months ago 44
C++ Question

Error with homebrew + opencv + libpng

On Mac OS Maverick I have installed OpenCV with a

brew install opencv

I created a simple program (copied from this tutorial). Compilation worked fine but when running the executable I get the following error:

dyld: Library not loaded: /usr/local/lib/libpng16.16.dylib
Referenced from: /usr/local/lib/libopencv_highgui.2.4.dylib
Reason: Incompatible library version: libopencv_highgui.2.4.dylib requires version 33.0.0 or later, but libpng16.16.dylib provides version 32.0.0
Trace/BPT trap: 5

I checked that
was properly installed via
brew install libpng
and ran a
brew upgrade
to make sure everything was up-to-date.

locate libpng16.dylib


Any idea?


Homebrew should ensure that you the correct dependencies install. However, it's possible that you have more than one version of libpng16 installed at different paths. Have a look in...


If you find any versions of the library in these locations then they may be causing the wrong one to be loaded when your program starts. As a quick fix you can try typing DYLD_LIBRARY_PATH=/usr/local/lib before your program name on the command line. In the longer term you may need to remove the conflicting versions altogether.