To be honest, I don't know. I don't really know what these things are. I am the only user on this computer, and whenever I try to download something, it asks for my password, but I don't know what it means to use root. Like I said, I'm computer illiterate.
I would recommend not installing GNUCash unless you want to spend a lot of time learning the command line. Its not as simple as the gnucash wiki says, I even had to fiddle with other unix commands.
Is there a particular reason why you want to use GNUCash over a OSX Finance package?