Hello @ALL,

I have generated an image collision using following command and collision images are also generated properly with same MD5 value but in MacOS it's showing The file “collision1.png” could not be opened. error message when try open generated collision png file.

Commands:
time ./png.py yes.png no.png
md5sum collision*.png
file collosion*.png
vbindiff collosion*.png
img2txt -H 10 collosion1.png
img2txt -H 10 collosion1.png