I've installed pygrib by using conda install -c conda-forge pygrib and no issues were raised. However, when importing it in order to use it I get this message:
ImportError: dlopen(/Users/andrea1994/anaconda3/lib/python3.6/site-packages/pygrib.cpython-36m-darwin.so, 2): Library not loaded: @rpath/libpng16.16.dylib
 Referenced from: /Users/andrea1994/anaconda3/lib/python3.6/site-packages/pygrib.cpython-36m-darwin.so
 Reason: Incompatible library version: pygrib.cpython-36m-darwin.so requires version 51.0.0 or later, but libpng16.16.dylib provides version 49.0.0

I've gone through several procedures that were thought to solve similar issues but none worked (updating libpng, uninstalling and installing back Anaconda,...). Does anyone have any clue? I'm not an expert in this field: most of the times I manage to get things working, but as you see sometimes I fail. Thank you!