當我從xcode 4.3.2升級到4.5.2時出現錯誤

Question

我有Mac OS X v10.7.5 Lion。我正在嘗試安裝Ruby 1.9.3。在做的過程中，我只是下載了xcode 4.5.2來替換4.3.2。但是當我這樣做時，我得到以下錯誤。我該如何解決這個問題？

在此先感謝。

The operation can’t be completed because some items had to be skipped. For each item, 
choose File > Get Info, make sure 「Locked」 is deselected, and then check the Sharing & 
Permissions section. When you are sure the items are unlocked and not designated as 
Read Only or No Access, try again. 

Answer 1

我發現我首先需要刪除舊的並在應用程序中放入一個新的。