Xcode 5.0.2が来てたので、ソフトウェア・アップデート経由でインストールしました。
Includes SDKs for OS X 10.9 Mavericks, OS X 10.8 Mountain Lion, and iOS 7.
- Fixes occasional hangs in iOS Simulator during app install, or when debugging.
- Fixes a crash that could occur while debugging on devices running iOS 6.
- Additional bug fixes and stability improvements.