重新啓動後Xcode不再啓動

Question

重新啓動我的Mac後，Xcode無法啓動。

我在OS X 10.10.2上使用Xcode 6.3。

我點擊圖標，什麼也沒有發生。我搜索了一會兒，發現如何使用CLI啓動Xcode。

/Applications/Xcode.app/Contents/MacOS/Xcode 

這工作，但有以下錯誤：

^[[Aobjc[2051]: Class IDEBlockScrollView is implemented in both /Applications/Xcode.app/Contents/Frameworks/IDEKit.framework/Versions/A/IDEKit and /Applications/Xcode.app/Contents/PlugIns/IDEProductsUI.ideplugin/Contents/MacOS/IDEProductsUI. One of the two will be used. Which one is undefined. 
2015-06-19 10:47:29.245 Xcode[2051:80392] DeveloperPortal: Using pre-existing current store at URL (file:///Users/admin/Library/Developer/Xcode/DeveloperPortal%206.3.db). 
2015-06-19 10:47:29.319 Xcode[2051:80101] [MT] iPhoneSimulator: SimVerifier returned: Error Domain=NSPOSIXErrorDomain Code=53 "Simulator verification failed." UserInfo=0x7fa3eee318d0 {NSLocalizedFailureReason=A connection to the simulator verification service could not be established., NSLocalizedRecoverySuggestion=Ensure that Xcode.app is installed on a volume with ownership enabled., NSLocalizedDescription=Simulator verification failed.} 

如何獲得的Xcode修復並再次用圖標來啓動？

Answer 1

當這發生在我身上，只有這步工作：

• 刪除/庫/開發人員
• 刪除Xcode.app
• 重新啓動OS X
• 下載和重新安裝的Xcode
• run Xcode

讓我知道它是否有效？