I backed up a dmg file years ago and have 2 copies sitting around.. really annoying since I have some old things there I need. I read that this might help but I *never* “hack” anything and don’t know if this is safe and how it even works > [https://www.openwall.com/john/](https://www.openwall.com/john/)
If I recall correctly, my password was somewhere around 15 characters/symbols/letters. Might be a totally lost cause but I really need help at least trying. Anyone have any ideas?
EDIT: I also have access to a decently fast PC, but not sure if it’s better to try from a mac since it’s formatted to work with the OS