I have programmed an application using Processing. I have exported as application and I have it for Mac, Linux and Windows. I only use Mac, but I want to change the app (the app that I have made) icon. How can I do this?

I also want to change the Application information (if you go on the menu bar of the application, yo can open another menú. One of the options is Abut ...[Name of the Application]), and the options of the menu bar.

Thank you very much,

Matiszz