Rubymotion 4.1 build problem

software used:

OSX 10.10.5
RubyMotion Starter 4.1
XCode 7.0 (7A220)

steps:

motion create rm-test
cd rm-test
rake

    Build ./build/iPhoneSimulator-9.0-Development
   Compile ./app/app_delegate.rb
    Create ./build/iPhoneSimulator-9.0-Development/rm-test.app
      Link ./build/iPhoneSimulator-9.0-Development/rm-test.app/rm-test
    Create ./build/iPhoneSimulator-9.0-Development/rm-test.app/PkgInfo
    Create ./build/iPhoneSimulator-9.0-Development/rm-test.app/Info.plist
      Copy ./resources/[email protected]
      Copy ./resources/[email protected]
      Copy ./resources/[email protected]
      Copy /Library/RubyMotion/lib/motion/project/template/ios/launch_image/launch_screen.png
      Copy /Library/RubyMotion/lib/motion/project/template/ios/launch_image/launch_screen.storyboardc
    Create ./build/iPhoneSimulator-9.0-Development/rm-test.app.dSYM
      Copy ./build/iPhoneSimulator-9.0-Development/rm-test.app.dSYM
  Simulate ./build/iPhoneSimulator-9.0-Development/rm-test.app
*** Starting simulator
2015-09-22 13:37:04.756 sim[4752:21247] [MT] DVTAssertions: Warning in /Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-8201/DVTFoundation/PlugInArchitecture/PlugInManager/DVTPlugInManager.m:257
Details:  Requested but did not find extension point with identifier Xcode.DVTFoundation.DevicePlatformMapping
Object:   <DVTPlugInManager: 0x10010fd80>
Method:   -extensionPointWithIdentifier:
Thread:   <NSThread: 0x100118eb0>{number = 1, name = main}
Please file a bug at http://bugreport.apple.com with this warning message and any useful information you can provide.

iOS Simulator error alert: Download the com.apple.CoreSimulator.SimRuntime.iOS-8-1 simulator runtime from the Downloads section in Xcode's Preferences.

TBD/steps.md