After PNG collision on Mac file showing corrupted and not opening.

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 <img width="270" alt="error" src="https://github.com/corkami/collisions/assets/89017365/6810b42b-9eaf-4ea9-9029-d1df62ce7243">