直到两天前，Xcode和模拟器都运行良好。我关闭了计算机，并安装了一些软件更新，包括macOS Catalina。我现在无法启动模拟器。它适用于任何设备，只是不会打开应用程序。我所看到的是以下内容：
我还注意到，无论我退出或在命令行中杀死它们多少次，以下两个处理器都能使自己保持生命：
我找到了类似的帖子，但是它很旧，并且没有如上所述的DeviceTypes文件夹。 https://shirome9.wordpress.com/2016/11/27/xcode-quit-unexpectedly/
我尝试了不同的方法，包括：
sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService
sudo killall -10 com.apple.CoreSimulator.CoreSimulatorService
xcrun simctl erase all
fastlane snapshot reset_simulators
这是当机报告的一部分：
Process: Simulator [2411]
Path: /Applications/Xcode.app/Contents/Developer/Applications/Simulator.app/Contents/MacOS/Simulator
Identifier: com.apple.iphonesimulator
Version: 11.1 (912.1)
Build Info: Indigo-912001000000000~187
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Simulator [2411]
User ID: 501
Date/Time: 2019-10-20 11:58:37.080 -0300
OS Version: Mac OS X 10.15 (19A602)
Report Version: 12
Bridge OS Version: 3.0 (14Y906)
Anonymous UUID: 22EA5B9E-426E-8952-358B-B710A2F7B37E
Sleep/Wake UUID: 1D8E834A-E0DC-4EFB-9E9F-591E94D88283
Time Awake Since Boot: 13000 seconds
System Integrity Protection: enabled
Crashed Thread: 1 Dispatch queue: com.apple.root.user-interactive-qos
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00007000006a8fd8
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Bus error: 10
Termination Reason: Namespace SIGNAL, Code 0xa
Terminating Process: exc handler [2411]
VM Regions Near 0x7000006a8fd8:
__LINKEDIT 000000010e9e0000-000000010ea17000 [ 220K] r--/r-- SM=COW /usr/lib/dyld
--> STACK GUARD 00007000006a8000-00007000006a9000 [ 4K] ---/rwx SM=NUL stack guard for thread 1
Stack 00007000006a9000-000070000072b000 [ 520K] rw-/rwx SM=COW thread 1
Thread 0:: Dispatch queue: com.apple.root.user-interactive-qos
0 libsystem_kernel.dylib 0x00007fff6e7de9f6 __ulock_wait + 10
1 libdispatch.dylib 0x00007fff6e643ca6 _dlock_wait + 44
2 libdispatch.dylib 0x00007fff6e643b35 _dispatch_thread_event_wait_slow + 36
3 libdispatch.dylib 0x00007fff6e653f51 _dispatch_apply_invoke_and_wait + 264
4 libdispatch.dylib 0x00007fff6e653a39 dispatch_apply_f + 761
5 com.apple.CoreFoundation 0x00007fff374db27f __104-[CFPrefsSearchListSource synchronouslySendDaemonMessage:andAgentMessage:andDirectMessage:replyHandler:]_block_invoke.119 + 97
6 com.apple.CoreFoundation 0x00007fff3740d1dd CFPREFERENCES_IS_WAITING_FOR_SYSTEM_AND_USER_CFPREFSDS + 74
7 com.apple.CoreFoundation 0x00007fff374db037 -[CFPrefsSearchListSource synchronouslySendDaemonMessage:andAgentMessage:andDirectMessage:replyHandler:] + 172
8 com.apple.CoreFoundation 0x00007fff37389aa3 -[CFPrefsSearchListSource alreadylocked_generationCountFromListOfSources:count:] + 215
9 com.apple.CoreFoundation 0x00007fff37389500 -[CFPrefsSearchListSource alreadylocked_getDictionary:] + 360
10 com.apple.CoreFoundation 0x00007fff37389124 -[CFPrefsSearchListSource alreadylocked_copyValueForKey:] + 152
11 com.apple.CoreFoundation 0x00007fff3738906c -[CFPrefsSource copyValueForKey:] + 47
12 com.apple.CoreFoundation 0x00007fff3738902a __76-[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:]_block_invoke + 32
13 com.apple.CoreFoundation 0x00007fff3737284c __108-[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:]_block_invoke + 381
14 com.apple.CoreFoundation 0x00007fff3737247f -[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:] + 364
15 com.apple.CoreFoundation 0x00007fff3737220e -[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:] + 145
16 com.apple.CoreFoundation 0x00007fff37371eb4 _CFPreferencesCopyAppValueWithContainerAndConfiguration + 101
17 com.apple.Foundation 0x00007fff39a313e7 -[NSUserDefaults(NSUserDefaults) init] + 1367
18 com.apple.Foundation 0x00007fff39a39706 +[NSUserDefaults(NSUserDefaults) standardUserDefaults] + 66
19 com.apple.AppKit 0x00007fff345a2014 +[NSApplication initialize] + 87
20 libobjc.A.dylib 0x00007fff6d336ca5 CALLING_SOME_+initialize_METHOD + 17
21 libobjc.A.dylib 0x00007fff6d3375d6 initializeNonMetaClass + 638
22 libobjc.A.dylib 0x00007fff6d3373a4 initializeNonMetaClass + 76
23 libobjc.A.dylib 0x00007fff6d337b15 initializeAndMaybeRelock(objc_class*, objc_object*, mutex_tt<false>&, bool) + 214
24 libobjc.A.dylib 0x00007fff6d329c5c lookUpImpOrForward + 969
25 libobjc.A.dylib 0x00007fff6d329419 _objc_msgSend_uncached + 73
26 com.apple.AppKit 0x00007fff345a1ce2 NSApplicationMain + 366
27 libdyld.dylib 0x00007fff6e693405 start + 1
Thread 1 Crashed:: Dispatch queue: com.apple.root.user-interactive-qos
0 com.apple.CoreFoundation 0x00007fff3736144a CFDictionaryGetValue + 75
1 com.apple.CoreFoundation 0x00007fff3738c419 __CFBinaryPlistCreateObjectFiltered + 93
2 com.apple.CoreFoundation 0x00007fff3738db6c __CFBinaryPlistCreateObjectFiltered + 6064
我们非常感谢您的帮助。由于这个问题，我正在浪费大量时间。