XCodeの再インストール
sudo rm -rf /Applications/Xcode.app
sudo rm -rf /Library/Preferences/com.apple.dt.Xcode.plist
sudo rm -rf ~/Library/Preferences/com.apple.dt.Xcode.plist
sudo rm -rf ~/Library/Caches/com.apple.dt.Xcode
sudo rm -rf ~/Library/Application Support/Xcode
sudo rm -rf ~/Library/Developer/Xcode
sudo rm -rf ~/Library/Developer/CoreSimulator