Because I just came into the discussion, I want to know if there is procedure in place for me to close my device, go on my MacBook Air and play against PC's? If so, why do two player friends show up on my friend list on the MacBook, both of them active, and I can only invite one of them. One has a green icon (Can be invited), the other (who was rejected my device for being "cross-platform", cannot be invited. There has to be a pathway to follow to overcome this. Please help.