Today, I've updated my iMac to macOS Mojave from macOS High Sierra. Since then I'm not able to open simulator. Every time I tried to open the simulator that crashes immediately. Whenever I tried to run the simulator via Xcode then Xcode shows this error
Timed out waiting for the simulator application for iphonesimulator to become ready
Also, I tried to open the simulator directly and it's crash immediately. Here the gif (gif is a little bit slow) -
System CPU & Memory Status -
Here some solution that I've tried but no luck -
Clear iPhone Simulator Cache
xcrun simctl erase allClear DerivedData
~/Library/Developer/Xcode/DerivedData/Clear iOS DeviceSupport
~/Library/Developer/Xcode/iOS DeviceSupport/Delete Xcode Preferences
defaults delete com.apple.dt.XcodeRestart Xcode & System
Update 1
macOS Logs -
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Device iPhone XS (978302BA-5255-44CB-A77C-188071B99A7C, iOS 12.0, Booted) is available but has no defaultDisplay'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff33a9543d __exceptionPreprocess + 256
1 libobjc.A.dylib 0x00007fff5f9a6720 objc_exception_throw + 48
2 CoreFoundation 0x00007fff33ab008e +[NSException raise:format:arguments:] + 98
3 Foundation 0x00007fff35e4c55d -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 194
4 Simulator 0x000000010e7510da Simulator + 106714
5 libdispatch.dylib 0x00007fff60a24d4f _dispatch_call_block_and_release + 12
6 libdispatch.dylib 0x00007fff60a25dcb _dispatch_client_callout + 8
7 libdispatch.dylib 0x00007fff60a2c120 _dispatch_lane_serial_drain + <…>
)
This command should fix your issue (close sim before and open after):
sudo killall -10 com.apple.CoreSimulator.CoreSimulatorService
After this, restart Xcode and if simulator not available then we need to add them manually from Windows > Device and Simulators
来源：https://stackoverflow.com/questions/52500234/ios-simulator-crash-on-xcode-10