1.关闭xcode
2.终端输入 sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService 输入你的电脑密码
3.终端输入 rm -rf ~/Library/Developer/CoreSimulator/Devices
xcode7解决多个模拟器问题
原文：http://www.cnblogs.com/mrhanlong/p/5004378.html
