Xcode 6 won't start (OS X 10.9.4)

Question

Recently, within the last few days, whenever I try to open Xcode6-Beta2 on my 2013 11\" MacBook Air running OS X 10.9.4, I get a problem report and Xcode won\'t run. I tried uni

Answer 1

I was using Xcode6-Beta3 fine up until today when I updated to 10.9.4. Now I get the same error, the interesting part of which is:

Application Specific Information: dyld: launch, loading dependent libraries

Dyld Error Message: Symbol not found: _OBJC_CLASS_$_LSApplicationProxy Referenced from: /System/Library/PrivateFrameworks/PlugInKit.framework/Versions/A/PlugInKit Expected in: /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices in /System/Library/PrivateFrameworks/PlugInKit.framework/Versions/A/PlugInKit

I have filed a bug with Apple regarding this issue.