With the latest beta (4) of el capitan and the latest Xcode beta I can't run any simulators. If I restore back to el capitain beta 3 it works fine.
I get the following in the console:
7/21/15 8:22:48.795 PM com.apple.xpc.launchd[1]: (com.apple.CoreSimulator.CoreSimulatorService.171.1.KX9uGUSjBNVf) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
7/21/15 8:22:48.795 PM Simulator[2815]: Error Domain=NSPOSIXErrorDomain Code=53 "Software caused connection abort" UserInfo={NSLocalizedDescription=Error returned in reply to notification request: Connection interrupted}
7/21/15 8:22:48.795 PM ibtoold[2763]: CoreSimulatorService connection interrupted. Resubscribing to notifications.
7/21/15 8:22:48.795 PM ibtoold[2764]: CoreSimulatorService connection interrupted. Resubscribing to notifications.
7/21/15 8:22:48.795 PM Simulator[2815]: Failed to allocate SimDeviceSet
7/21/15 8:22:48.795 PM Simulator[2815]: CoreSimulatorService connection interrupted. Resubscribing to notifications.
7/21/15 8:22:48.804 PM com.apple.xpc.launchd[1]: (com.apple.ReportCrash[2929]) Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash
7/21/15 8:22:49.430 PM ReportCrash[2929]: Saved crash report for com.apple.CoreSimulator.CoreSimulatorService[2928] version 171 (171) to /Users/barrettjacobsen/Library/Logs/DiagnosticReports/com.apple.CoreSimulator.CoreSimulatorService_2015-07-21-202249_Barretts-MacBook-Pro.crash
7/21/15 8:22:49.432 PM ReportCrash[2929]: Removing excessive log: file:///Users/barrettjacobsen/Library/Logs/DiagnosticReports/com.apple.CoreSimulator.CoreSimulatorService_2015-07-21-175403_Barretts-MacBook-Pro.crash
7/21/15 8:22:49.752 PM DataDetectorsDynamicData[2931]: ### Failed to load Addressbook class CNContactNameFormatter
7/21/15 8:22:52.676 PM Console[2935]: Failed to connect (_consoleX) outlet from (NSApplication) to (ConsoleX): missing setter or instance variable
7/21/15 8:22:53.330 PM Console[2935]: SwitchResX Daemon(685) System Policy: deny scripting-addition-send 'SWRS'/'SWSP'
7/21/15 8:22:54.475 PM Console[2935]: Default Folder X Agent(785) System Policy: deny scripting-addition-send 'dfdX'/'Load'
7/21/15 8:22:56.712 PM com.apple.CDScheduler[260]: Thermal pressure state: 1 Memory pressure state: 0
7/21/15 8:22:56.712 PM com.apple.CDScheduler[45]: Thermal pressure state: 1 Memory pressure state: 0
7/21/15 8:22:58.813 PM com.apple.CoreSimulator.CoreSimulatorService[2943]: com.apple.CoreSimulator.CoreSimulatorService 171~1 starting.
7/21/15 8:22:58.000 PM kernel[0]: AMFI: com.apple.CoreSi(pid 2943) - [deny-mmap] mapped executable file has no team identifier in its signature: /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 7.1.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/host/liblaunch_sim.dylib
7/21/15 8:22:58.820 PM diagnosticd[117]: error evaluating process info - pid: 2943, puniqueid: 2943
7/21/15 8:22:58.821 PM com.apple.xpc.launchd[1]: (com.apple.CoreSimulator.CoreSimulatorService.171.1.KX9uGUSjBNVf[2943]) Service exited due to signal: Segmentation fault: 11
7/21/15 8:22:58.821 PM Simulator[2815]: CoreSimulatorService connection interrupted. Resubscribing to notifications.
7/21/15 8:22:58.821 PM Xcode[2801]: CoreSimulatorService connection interrupted. Resubscribing to notifications.
7/21/15 8:22:58.821 PM com.apple.xpc.launchd[1]: (com.apple.CoreSimulator.CoreSimulatorService.171.1.KX9uGUSjBNVf) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
7/21/15 8:22:58.821 PM ibtoold[2763]: CoreSimulatorService connection interrupted. Resubscribing to notifications.
7/21/15 8:22:58.821 PM ibtoold[2764]: CoreSimulatorService connection interrupted. Resubscribing to notifications.
