I managed to get Android Studio working on my mac well enough to build the PixelKnot application and deploy it into the emulator. My goal with this was to see if I could verify that different Android base versions lead to different results with PixelKnot. I believe we are running up against this issue with F5 PK images that we are trying to crack with F5 lib running on a linux host. It's pointless to try to BF crack these images if we cannot know for sure what we are trying to BF actually matches the source image.