Update AppImplMac.mm
Update AppImplMac.mm

Removed hardcoded use of main display for position calculation using @pizthewiz's suggestion
sosolimited/Cinder,sosolimited/Cinder,morbozoo/sonyHeadphones,2666hz/Cinder,morbozoo/sonyHeadphones,morbozoo/sonyHeadphones,2666hz/Cinder,morbozoo/sonyHeadphones,sosolimited/Cinder,2666hz/Cinder,sosolimited/Cinder,2666hz/Cinder