ios模拟器无法启动 - 黑屏， 运行模拟器时，xcode显示“无效设备状态”
当模拟器从Spotlight 启动时也会发生
试过：
$ xcrun simctl list == Device Types == iPhone 4s (com.apple.CoreSimulator.SimDeviceType.iPhone-4s) iPhone 5 (com.apple.CoreSimulator.SimDeviceType.iPhone-5) iPhone 5s (com.apple.CoreSimulator.SimDeviceType.iPhone-5s) iPhone 6 Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-6-Plus) iPhone 6 (com.apple.CoreSimulator.SimDeviceType.iPhone-6) iPad 2 (com.apple.CoreSimulator.SimDeviceType.iPad-2) iPad Retina (com.apple.CoreSimulator.SimDeviceType.iPad-Retina) iPad Air (com.apple.CoreSimulator.SimDeviceType.iPad-Air) Resizable iPhone (com.apple.CoreSimulator.SimDeviceType.Resizable-iPhone) Resizable iPad (com.apple.CoreSimulator.SimDeviceType.Resizable-iPad) == Runtimes == iOS 8.3 (8.3 - 12F69) (com.apple.CoreSimulator.SimRuntime.iOS-8-3) == Devices == -- iOS 8.3 -- iPhone 4s (6EFCAF10-4208-4A5E-B956-500AC64E4F78) (Booted) iPhone 5 (3111A1E3-1950-44CF-9E77-5862AF8D3C0A) (Shutdown) iPhone 5s (C8D57731-039E-41DE-8097-A8AF7A4B8778) (Shutdown) iPhone 6 Plus (42B3FFAB-6718-44E4-9374-9C6A91D91AC2) (Shutdown) iPhone 6 (765AD568-D63E-41F2-822E-6A7DF22E5F61) (Shutdown) iPad 2 (28339A10-7624-46AA-9659-F563F9D70958) (Shutdown) iPad Retina (226EB488-0ECC-4166-BAB5-E787C2EC23B4) (Shutdown) iPad Air (EE9742AC-FFE4-43E3-B7A7-FCFB5E60137D) (Shutdown) Resizable iPhone (6A94AFC8-C862-4984-94B5-E13FCADBA9DC) (Shutdown) Resizable iPad (59E84767-46C5-4A4C-A9D5-E2C4B0600FC2) (Shutdown)
设备卡在启动状态
尝试了
xcrun simctl擦除所有
版本：mac 10.10.3，xcode 6.3.2，模拟器8.3
附加信息：昨天在我完成工作之前它没有任何问题，没有任何改变 - 只是试图今天早上从skretch运行它。
尝试升级xcode - 它现在等待1天......
每天都会带来新的Xcode问题，这个问题是否可以解决？除了在新的Mac上再投入2000欧元
编辑： 升级解决了这个问题 - 但仅仅几天，没有它回到黑色。
新版本是版本6.4（6E35b）
有关升级的说明：