In the US its not Haram if you are having the fish fillet with mayonnaise instead of tartar sauce. btw - they recently changed their batter so the earlier confirmed halal status of the fish fillet is pending a reconfirmation http://www.muslimconsumergroup.com/Events.do?menu=Events&eventAction=eventdetail&eventId=261 MCDONALD FISH FILLET IS MUSHBOOH McDonald Corporation has changed the coating formula very recently. The new coating includes whey, Turmeric Extract and Natural Flavor. MCG is in the processing of finding the Halal status of those three ingredients. Please avoid eating fish fillet at McDonald until the investigation is complete.
i used to like a McD's now and again but now i know it's Haram. even the fries contain beef extract. shame! but saying that, there are Halal alternatives out there.