Xcode7 Installing the simulator

Upgrade the computer to OSX 10.11, and then Xcode upgrade to 7, but in the installation of the simulator, always wait until all download, the final appearance requires authorization to install, but at the beginning of the download, has entered a password this should be authorized, not clear what is the reason, has been installed failure. Then I went to Apple's official forum to see it.

Finally, the answer was found on stack overflow.

The error message that the installation fails is generally (some versions may be directly prompted by the English version, but should be able to read):

1. Could not download and install IOS 8.1 Simulator. Require authorization to install these packages

The way to solve this problem is to quit Xcode and then start with the following command, then download the installation and then there is no problem.

1. Sudo/applications/xcode.app/contents/macos/xcode

Xcode7 Installing the simulator