Updated sysdata_darwin.go to remove some TODOs and change most, if not all, embedded magic numbers to named constants.
Updated sysdata_darwin.go to remove some TODOs and change most, if not all, embedded magic numbers to named constants.

robbiev/ui,ProtonMail/ui,janstk/ui,janstk/ui,cainiaocome/ui,292388900/ui,ProtonMail/ui,beni55/ui,mirrr/ui,hajimehoshi/ui,mirrr/ui,mirrr/ui,HunterChen/ui,janstk/ui,292388900/ui,beni55/ui,UIKit0/ui,cainiaocome/ui,UIKit0/ui,HunterChen/ui,beni55/ui,hajimehoshi/ui,cainiaocome/ui,hajimehoshi/ui,ProtonMail/ui,292388900/ui,robbiev/ui,UIKit0/ui,HunterChen/ui,robbiev/ui