也可能是您的安装问题。 Symlinking到最新的codesign_allocate清除了我的问题：

May also be an issue with your install. Symlinking to the latest codesign_allocate cleared up the issue in my case:

sudo mv /usr/bin/codesign_allocate /usr/bin/codesign_allocate_old
sudo ln -s /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/codesign_allocate /usr/bin