Apple has seeded a fourth beta (build 12H4125a) of its upcoming iOS 8.4 firmware update on Tuesday following yesterday's WWDC 2015 Keynote event. iOS 8.4 is currently in beta alongside iOS 9 beta 1
This beta comes almost an entire month after the third beta
of iOS 8.4 that launched in May.
iOS 8.4 beta includes a redesigned Music application that will contain Apple Music,