Most MacOS users install Iguana in the /Applications folder.
On MacOS when you see a pretty application icon in that folder, it’s actually a hidden directory called IguanaX.app which you can go inside.
The instructions given above meant that we went inside that folder and invoked the program file that is Iguana to change the password to “temp”.
What happens if you installed somewhere else other than Applications?
Then you will need to enter the path slightly differently altering the part of the path in the red box: