Disregard the above log; that was from a September 2017 build. On RC1: Process: qemu-system-x86_64 [6567] Path: /usr/local/bin/qemu-system-x86_64 Identifier: qemu-system-x86_64 Version: 0 Code Type: X86-64 (Native) Parent Process: bash [1558] Responsible: qemu-system-x86_64 [6567] User ID: 501 Date/Time: 2018-03-31 13:53:57.851 -0700 OS Version: Mac OS X 10.13.4 (17E199) Report Version: 12 Anonymous UUID: 28693BB0-7F66-6066-026C-DDE857D912F6 Time Awake Since Boot: 2200 seconds System Integrity Protection: disabled Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_INSTRUCTION (SIGILL) Exception Codes: 0x0000000000000001, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Illegal instruction: 4 Termination Reason: Namespace SIGNAL, Code 0x4 Terminating Process: exc handler [0] Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 qemu-system-x86_64 0x000000010524165b 0x105134000 + 1103451 1 qemu-system-x86_64 0x00000001051e2481 0x105134000 + 713857 2 qemu-system-x86_64 0x00000001051e2170 0x105134000 + 713072 3 qemu-system-x86_64 0x00000001051e3e2a 0x105134000 + 720426 4 qemu-system-x86_64 0x00000001052b625a 0x105134000 + 1581658 5 qemu-system-x86_64 0x00000001053e5606 0x105134000 + 2823686 6 qemu-system-x86_64 0x00000001053e65bb 0x105134000 + 2827707 7 qemu-system-x86_64 0x00000001053e4126 0x105134000 + 2818342 8 qemu-system-x86_64 0x00000001051c35fc 0x105134000 + 587260 9 qemu-system-x86_64 0x00000001051c36e6 0x105134000 + 587494 10 qemu-system-x86_64 0x00000001051c8040 0x105134000 + 606272 11 qemu-system-x86_64 0x000000010525a462 0x105134000 + 1205346 12 qemu-system-x86_64 0x00000001053c8e28 0x105134000 + 2706984 13 com.apple.CoreFoundation 0x00007fff5294561c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12 14 com.apple.CoreFoundation 0x00007fff529454ea _CFXRegistrationPost + 458 15 com.apple.CoreFoundation 0x00007fff52945221 ___CFXNotificationPost_block_invoke + 225 16 com.apple.CoreFoundation 0x00007fff52903d72 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1826 17 com.apple.CoreFoundation 0x00007fff52902e03 _CFXNotificationPost + 659 18 com.apple.Foundation 0x00007fff54a1f8c7 -[NSNotificationCenter postNotificationName:object:userInfo:] + 66 19 com.apple.AppKit 0x00007fff4fff3206 -[NSApplication _postDidFinishNotification] + 313 20 com.apple.AppKit 0x00007fff4fff2e4f -[NSApplication _sendFinishLaunchingNotification] + 220 21 com.apple.AppKit 0x00007fff4fec5ab3 -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] + 562 22 com.apple.AppKit 0x00007fff4fec56e9 -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 690 23 com.apple.Foundation 0x00007fff54a62714 -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 287 24 com.apple.Foundation 0x00007fff54a62592 _NSAppleEventManagerGenericHandler + 102 25 com.apple.AE 0x00007fff53a3bdd0 aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*) + 1788 26 com.apple.AE 0x00007fff53a3b677 dispatchEventAndSendReply(AEDesc const*, AEDesc*) + 41 27 com.apple.AE 0x00007fff53a3b565 aeProcessAppleEvent + 383 28 com.apple.HIToolbox 0x00007fff51c1d4a0 AEProcessAppleEvent + 55 29 com.apple.AppKit 0x00007fff4fec0d32 _DPSNextEvent + 2788 30 com.apple.AppKit 0x00007fff50656e34 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 3044 31 com.apple.AppKit 0x00007fff4feb5885 -[NSApplication run] + 764 32 qemu-system-x86_64 0x00000001053ca853 0x105134000 + 2713683 33 libdyld.dylib 0x00007fff7ace7015 start + 1 Thread 1: 0 libsystem_kernel.dylib 0x00007fff7ae37a1e __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff7b000589 _pthread_cond_wait + 732 2 qemu-system-x86_64 0x00000001054b0b27 0x105134000 + 3656487 3 qemu-system-x86_64 0x00000001054bf128 0x105134000 + 3715368 4 libsystem_pthread.dylib 0x00007fff7afff661 _pthread_body + 340 5 libsystem_pthread.dylib 0x00007fff7afff50d _pthread_start + 377 6 libsystem_pthread.dylib 0x00007fff7affebf9 thread_start + 13 Thread 2: 0 libsystem_kernel.dylib 0x00007fff7ae38292 __workq_kernreturn + 10 1 libsystem_pthread.dylib 0x00007fff7afff009 _pthread_wqthread + 1035 2 libsystem_pthread.dylib 0x00007fff7affebe9 start_wqthread + 13 Thread 3:: Dispatch queue: NSCGSDisableUpdates 0 libsystem_kernel.dylib 0x00007fff7ae2e20a mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff7ae2d724 mach_msg + 60 2 com.apple.SkyLight 0x00007fff74b129f5 CGSUpdateManager::enable_updates_common() + 565 3 com.apple.SkyLight 0x00007fff74ab6b28 CGSUpdateManager::enable_update(unsigned long long) + 320 4 libdispatch.dylib 0x00007fff7acb564a _dispatch_call_block_and_release + 12 5 libdispatch.dylib 0x00007fff7acade08 _dispatch_client_callout + 8 6 libdispatch.dylib 0x00007fff7acc2267 _dispatch_queue_serial_drain + 635 7 libdispatch.dylib 0x00007fff7acb51b6 _dispatch_queue_invoke + 373 8 libdispatch.dylib 0x00007fff7acc2f5d _dispatch_root_queue_drain_deferred_wlh + 332 9 libdispatch.dylib 0x00007fff7acc6d71 _dispatch_workloop_worker_thread + 880 10 libsystem_pthread.dylib 0x00007fff7affefd2 _pthread_wqthread + 980 11 libsystem_pthread.dylib 0x00007fff7affebe9 start_wqthread + 13 Thread 4: 0 libsystem_pthread.dylib 0x00007fff7affebdc start_wqthread + 0 1 ??? 0x000070000e958b50 0 + 123145546992464 Thread 5: 0 libsystem_kernel.dylib 0x00007fff7ae38292 __workq_kernreturn + 10 1 libsystem_pthread.dylib 0x00007fff7afff009 _pthread_wqthread + 1035 2 libsystem_pthread.dylib 0x00007fff7affebe9 start_wqthread + 13 Thread 6: 0 libsystem_kernel.dylib 0x00007fff7ae38042 __sigwait + 10 1 libsystem_pthread.dylib 0x00007fff7b001ad9 sigwait + 61 2 qemu-system-x86_64 0x00000001054aee62 0x105134000 + 3649122 3 libsystem_pthread.dylib 0x00007fff7afff661 _pthread_body + 340 4 libsystem_pthread.dylib 0x00007fff7afff50d _pthread_start + 377 5 libsystem_pthread.dylib 0x00007fff7affebf9 thread_start + 13 Thread 7: 0 libsystem_kernel.dylib 0x00007fff7ae37cfa __select + 10 1 libglib-2.0.0.dylib 0x00000001061ebb60 g_poll + 430 2 qemu-system-x86_64 0x00000001054ae80b 0x105134000 + 3647499 3 qemu-system-x86_64 0x0000000105252eb2 0x105134000 + 1175218 4 libsystem_pthread.dylib 0x00007fff7afff661 _pthread_body + 340 5 libsystem_pthread.dylib 0x00007fff7afff50d _pthread_start + 377 6 libsystem_pthread.dylib 0x00007fff7affebf9 thread_start + 13 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000000000000001 rbx: 0x000000000000000d rcx: 0x0000000000000000 rdx: 0x0000000000000000 rdi: 0x000000000000000d rsi: 0x0000000000000000 rbp: 0x00007ffeeaac9f40 rsp: 0x00007ffeeaac9f00 r8: 0x00007ffeeaac9f04 r9: 0x00007ffeeaac9f00 r10: 0x00007ffeeaac9f08 r11: 0x00007ffeeaac9f0c r12: 0x0000000000000000 r13: 0x00007fe43f0af400 r14: 0x0000000000000000 r15: 0x0000000000000000 rip: 0x000000010524165b rfl: 0x0000000000010246 cr2: 0x000000010518235d Logical CPU: 0 Error Code: 0x00000000 Trap Number: 6