在启动模拟器调试项目是，编译通过，但是模拟器无法启动，报错：
An error was encountered while running (Domain = com.apple.CoreSimulator.SimError, Code = 146)

环境：
XCODE 6.1.1 + IOS 8.1 simulator

网上的reboot xcode 和 simulator、reboot os，还有reset simulator contents and settings 什么的，试了根本没用啊，摔！

现贴出
CoreSimulator日志：

Jan 22 14:44:51 boke-m2.local CoreSimulatorService[3517] : Error Domain=com.apple.CoreSimulator.SimError Code=146 "Unable to lookup in current state: Shutdown" UserInfo=0x7fa43870e420 {NSLocalizedDescription=Unable to lookup in current state: Shutdown}
Jan 22 14:44:51 boke-m2.local CoreSimulatorService[3517] : Error Domain=com.apple.CoreSimulator.SimError Code=146 "Unable to lookup in current state: Shutdown" UserInfo=0x7fa43870e420 {NSLocalizedDescription=Unable to lookup in current state: Shutdown}
Jan 22 14:44:59 boke-m2.local CoreSimulatorService[3517] : Error Domain=NSPOSIXErrorDomain Code=3 "The operation couldn’t be completed. No such process"
Jan 22 14:44:59 boke-m2.local CoreSimulatorService[3517] : Error Domain=NSPOSIXErrorDomain Code=3 "The operation couldn’t be completed. No such process"
Jan 22 14:45:00 boke-m2.local com.apple.dt.Xcode[20752] : Error looking up host support port

Simulator日志：
Jan 22 16:17:22 boke-m2.local iOS Simulator[2649] : Error communicating with SimulatorBridge: NSObjectNotAvailableException - Unable to connect to SimulatorBridge