[boringssl] Failed to log metrics

А если вам мозолит глаз такая ошибка coretelephony в логах Xcode при запуске на симуляторе:

[Client] Synchronous remote object proxy returned error: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.commcenter.coretelephony.xpc was invalidated: failed at lookup with error 3 - No such process." UserInfo={NSDebugDescription=The connection to service named com.apple.commcenter.coretelephony.xpc was invalidated: failed at lookup with error 3 - No such process.}

то её можно заглушить выполнив команду в консоли:

xcrun simctl spawn booted log config --subsystem com.apple.CoreTelephony --mode "level:off"

Вернуть обратно можно так:

xcrun simctl spawn booted log config --subsystem com.apple.CoreTelephony --mode "level:default"