Hi, can someone help me understand how Mac works? I am quite familiar with UNIX systems and I am trying ot figure out how the UNIX side of Mac workds. For example, when I open up firefox (from GUI) and I do a ps -ef (from terminal as root) to check the processes running, I don't see firefox If I open a firefox process from GUI and then run firefox from terminal (I find the bin), it spawns two parent process instead of a child. I see this from the dock. This is weird because I see two firefox icons in my dock. How does this work???