I installed matrix2png on my Mac and had used it without problem before last week when I installed another image manipulating tool "circos". Circos requires me to install a different version of libpng, and I did. After that, I am no longer able to run matrix2png, which gives me the following error. I think the old ligpnb is not linked any more. Does anyone know how to fix this error? - appreciate your help.
dyld: Library not loaded: /usr/local/lib/libpng15.15.dylib
Referenced from: /usr/local/bin/matrix2png
Reason: image not found
Answer
Those step solve my problem:
brew versions libpng
You will see some versions of libpng, but unfortunately not 1.5.15, so next you should install 1.5.18.
git checkout 7bec702 Library/Formula/libpng.rb
brew install libpng
You'll will find version 1.5.18 and some another versions.
ln -s /usr/local/Cellar/libpng/1.5.18/lib/libpng15.15.dylib /usr/local/lib/libpng15.15.dylib`
See https://github.com/Homebrew/homebrew-php/issues/1055
Some more info on installing certain versions of brew formulas can be found at https://coderwall.com/p/lqphzg.