I am on a network where I am not allowed to use a router. However I am allowed to share my internet connection to my Xbox 360. I have a Macbook and I was able to share my internet connection in Windows by just selecting my ethernet port and sharing it with my USB ethernet dongle. I know how to do this in windows but don't know how to do it in OS X. How do I share my connection (I have tried the sharing in the preferences panel) and assign an IP to my Xbox through my Mac? Thanks in advance.