After the update to iOS8.4 on my device XCode7.2b stopped working. My device is not selectable in the list of devices and XCode says "Could not find Developer Disk Image".
Any idea how to solve it?
Found a solution:
Just copy XCode 8.4 folder from this location:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport
to this location:
/Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport