After update OS X to El Capitain Xcode can't create build correctly. After start app crashes when try create UIImage instance
UIImage(named: "icon_back");
and get an error in console
[CUIThemeRendition newImageFromCSIDataSlice:ofBitmap: usingColorspace:] Unsupported pixel format in CSI got 4
Xcode - Version 6.4 Target iOS version - 7.0 OS X version - El Capitain
Update
I don't like this solution, but after Xcode reinstall this issue has been fixed.