Open Radar

 
Summary:
When I try to build & run on my Watch device, Xcode get stuck on "Installing to Josh's Apple Watch | Copying libswiftCore.dylib" in Xcode's top bar.

Steps to Reproduce:
1. Select Watch app target and Josh's iPhone 6 + Josh's Apple Watch to run (actual devices, not simulator)
2. Click the Run button
3. Observe a few messages in Xcode's top bar until it says "Installing to My Apple Watch | Copying libswiftCore.dylib".

Expected Results:
Xcode should install and run the app on my Apple Watch device

Actual Results:
Xcode get stuck for several minutes with the message "Installing to Josh's Apple Watch | Copying libswiftCore.dylib" in the top bar, with the blue progress bar about 1/4 of the way to the end. After several minutes, it progresses to about halfway.

Version:
Xcode 7 beta 5 (7A176x)
OS X Yosemite 10.10.4 (14E46)

Notes:
I've tried cleaning the project and deleting derived data, and neither seems to have any effect. When I've gotten tired of waiting and hit the Stop button, it doesn't stop - the message still appears in the top bar of Xcode.

Configuration:
This occurs with the following devices:
- iPhone 6 (iOS 9 beta 5)
- Apple Watch (watchOS 2 beta 5)

It does not occur when running in the simulator.