Question about Stereo, NAV and TV

[BMW Guy]

Question. I have a 2001 X5 that currently has an in dash CD player with a radio below. I am wondering if I can install the 16:9 screen in my dash and have the stereo system still function properly. The reason I want the screen is not for the navagation system but I want to use the screen as a monitor that i can plug in my mini mac into so i can view whats being displayed. I understand there is some sort of TV module that can be used to do this? If anyone can help me out i would appreciate it.
I'm told the stereo system in my X5 is a premium unit, if that helps.