For mod= You need a modifier key listed like Shift,ALT or Control
Actualy this isn't true, you can use a simple 'mod' or 'nomod', with 'mod' reacting to any modifier and 'nomod', if none is pressed.

i need macro put on my alt and i controll main char and let him heal if group need heal the alt heal auto group or who need hea
Maybe its just me, but I don't understand what you realy want to do, could you specify it a little bit clearer?