Timed out waiting for device to boot,unable to boot the IOS Simulator

Normal work about Xcode appeared bug resolved must make a record, or next time really met only remember met, how to solve is really forget.

Com+r running Xcode, the simulator half a day did not respond, will appear in the following figure 1 such a box, the other timed out of waiting for device to boot this sentence of a bullet box, but the problem solved this figure 2 of the box is not timely, Just remember this sentence.

This problem is mostly in the upgrade Xcode or remove Xcode and then install the new, you will encounter problems, I installed the delete loop n times, the problem is not resolved, the Internet to find a half-day also did not solve, and finally you guess how to solve, sister's, and then restart the machine OK ~ These are the wonderful bug ~ Many such similar problems, actually reset the simulator, or quit the simulator or Xcode, or clean, and so on, this seemingly useless operation has solved the problem.

Timed out waiting for device to boot,unable to boot the IOS Simulator