djemrose

OSX Sierra 10.12.6 libpng 1.6.34 node v8.6.0 npm 5.6.0 ``` brew install libpng Updating Homebrew... ==> Auto-updated Homebrew! Updated 2 taps (homebrew/core, homebrew/php). ==> Updated Formulae binaryen chuck git idnits...

Can confirm same as @harryyuanfeng JPG works fine but PNG does not.