I'm having trouble getting Macro Focus turned on. It is currently grayed out and won't let me select it. Any thoughts?

Switch your focus ring into the other position and try...

Yep! I didn't realize it had to be in autofocus to work.

macro can work in manual focus

lets call the focus ring position A & B. setting A is manual focus only, B is manual / autofocus. for macro to work you have to be in B for macro to work.

obviously macro has to be turned on, but it will work in auto or manual focus mode as long at the focus ring is set to B