OpenCV GTK+2.x error

Question

I had installed OpenCV following these steps (). After trying to compile one examples,i got this error :

OpenCV Error: Unspecified error (The function is no         


        

Answer 1

In order to improve @Nic Szer's answer I want to explain how to fix this error on Mac OS in three simple steps.

1. Remove installed OpenCV version to avoid mess up later

   pip3 uninstall opencv-python 
   

2. Lower your python version to 3.5 (current version 3.6 has problems with conda which we will use to install OpenCV)

   conda install python=3.5
   

3. Finally, use conda to install working version of OpenCV

   conda install -c menpo opencv3 
   

And then voila: OpenCV will start working on your Mac OS(Siera 10.12.4).