iOS Simulator keeps quitting unexpectedly after system updates - cannot launch Simulator.app

Until two days ago, Xcode and simulators were working perfectly fine. I turned the computer off and some software updates got installed, including macOS Catalina). I am now unable to launch Simulator. It's for any device, it simply doesn't open the application. All I see is "simulator quit uenxpectedly"


I've also noticed that Simulator and processors keep themselves alive no matter how many times I quit them or kill them from command line:

com.apple.CoreSimulator.CoreSimulatorService

Simulator


I found similar posts, but they are at least three years old and got a /DeviceTypes folder withing /Developer which I don't.


I have tried different approaches, including:

  • Deleting DerivedData folder
  • Deleting /Library/Developer/Xcode folder
  • Updating Xcode to 11.1
  • Usinng Xcode 10.3, where the command line tools are actually incompatible with Catalina OS.
  • Reinstalling Xcode, restarting my machine at every step of the deletion and reinstallation
  • Deleting CoreSimulator folder
  • The following commands in terminal:


sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService

sudo killall -10 com.apple.CoreSimulator.CoreSimulatorService

xcrun simctl erase all

fastlane snapshot reset_simulators


Here's a part of the crash report. I can provide the full logs if needed:Searched for the the exception types annd codes, and all I found was for real devices, not simulators.


Any help is appreciated, as I am losing serious time with this issue.


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

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Replies

Did you try to run XCode, close it. Reboot the Mac and reopen XCode ?

Yes, I tried it several times, with no luck unfortunately.