iPhone becomes ineligible device in Xcode 7 beta2 after upgraded to iOS 8.4

Question

So I'm doing test on my iPhone 6 and everything works just fine with iOS 8.3. After upgrading to 8.4 my device became unavailable. Does anyone know why??

Answer 1

Just found out the solution:

1. Download Xcode 6.4

2. Go to its content directory: /Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

3. Copy folder "8.4 (12H141)" which contains the device support to the same path of Xcode 7 beta and it works fine.