Q:

Black screen on iOS Simulator Xcode 8

Tried 

Uninstalling then reinstalling Xcode 
reset content & setting on simulator
crying 
rebooting simulator
simulating pressing home on simulator
beta & release version of Xcode 
different device simulators
starting a new project from scratch and running

Problem I launch my app and it runs, I know this cos I see the log output of a print() in the console. However the simulators screen is blank, just black. No UI at all. I can eliminate my app being the problem as When I press (simulate pressing) home it should show me the springboard but its blank (black screen). I reset content & settings. Blank.
anyone able to help? 
Additional:
I have completely deleted Xcode, all traces of it from the Mac. Then reinstalled it. Started a new project and (as before blank screen). However this time I notice an error alert.
Rountined
App quit Unexpectedly

Google finds nothing to suggest what this is or if its related to my issue. However the log file is this, any one able to diagnose the issue?
Process:               routined [1045]
Path:                  /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/libexec/routined
Identifier:            routined
Version:               413.0.10
Code Type:             X86-64 (Native)
Parent Process:        launchd_sim [1039]
Responsible:           routined [1045]
User ID:               501

Date/Time:             2016-11-14 12:03:49.450 +0000
OS Version:            Mac OS X 10.12.2 (16C41b)
Report Version:        12
Anonymous UUID:        EB6CBF9E-B878-C122-2B34-BA3ED088512F

Time Awake Since Boot: 1900 seconds

System Integrity Protection: disabled

Crashed Thread:        5  Dispatch queue: RTMigrationManager-0x7fd26d50fe00

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Application Specific Information:
abort() called
CoreSimulator 338.10 - Device: iPhone 7 Plus - Runtime: iOS 10.2 (14C5062c) - DeviceType: iPhone 7 Plus

Thread 0:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib          0x00000001138f938a mach_msg_trap + 10
1   libsystem_kernel.dylib          0x00000001138f87d7 mach_msg + 55
2   com.apple.CoreFoundation        0x000000010f130d24 __CFRunLoopServiceMachPort + 212
3   com.apple.CoreFoundation        0x000000010f1301a1 __CFRunLoopRun + 1345
4   com.apple.CoreFoundation        0x000000010f12fa04 CFRunLoopRunSpecific + 420
5   com.apple.Foundation            0x000000010e6e98c0 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 274
6   com.apple.Foundation            0x000000010e6e979b -[NSRunLoop(NSRunLoop) run] + 76
7   libcoreroutine.dylib            0x000000010e388c31 -[RTLifeCycleManager start] + 1124
8   routined                        0x000000010e2d6ecc 0x10e2d6000 + 3788
9   libdyld.dylib                   0x00000001135d268d start + 1

Thread 1:: Dispatch queue: com.apple.libdispatch-manager
0   libsystem_kernel.dylib          0x0000000113901e5a kevent_qos + 10
1   libdispatch.dylib               0x000000011357dc37 _dispatch_mgr_wait_for_event + 79
2   libdispatch.dylib               0x0000000113577a81 _dispatch_mgr_invoke + 248
3   libdispatch.dylib               0x0000000113577883 _dispatch_mgr_thread + 54

Thread 2:
0   libsystem_kernel.dylib          0x00000001139014e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib         0x0000000113935791 _pthread_wqthread + 1426
2   libsystem_pthread.dylib         0x00000001139351ed start_wqthread + 13

Thread 3:: Dispatch queue: RTDefaultsManager-0x7fd26d50ec80-ServiceQueue
0   libsystem_kernel.dylib          0x0000000113900cb6 __psynch_mutexwait + 10
1   libsystem_pthread.dylib         0x0000000113935f6a _pthread_mutex_lock_wait + 100
2   com.apple.CoreFoundation        0x000000010f0e8858 -[CFPrefsSearchListSource alreadylocked_copyDictionary] + 312
3   com.apple.CoreFoundation        0x000000010f0e854c -[CFPrefsSearchListSource alreadylocked_copyValueForKey:] + 60
4   com.apple.CoreFoundation        0x000000010f1cf045 -[CFPrefsSource copyValueForKey:] + 53
5   com.apple.CoreFoundation        0x000000010f1f5640 __76-[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:]_block_invoke + 32
6   com.apple.CoreFoundation        0x000000010f20a702 __108-[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:]_block_invoke + 322
7   com.apple.CoreFoundation        0x000000010f209f09 normalizeQuintuplet + 329
8   com.apple.CoreFoundation        0x000000010f20a5b8 -[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:] + 104
9   com.apple.CoreFoundation        0x000000010f1f55a6 -[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:] + 310
10  com.apple.Foundation            0x000000010e6cc69b -[NSUserDefaults(NSUserDefaults) objectForKey:] + 43
11  libcoreroutine.dylib            0x000000010e386602 -[RTDefaultsManager _objectForKey:] + 169
12  libcoreroutine.dylib            0x000000010e38612b __34-[RTDefaultsManager objectForKey:]_block_invoke + 30
13  libdispatch.dylib               0x000000011358912e _dispatch_client_callout + 8
14  libdispatch.dylib               0x0000000113571d3f _dispatch_non_barrier_sync_f_invoke + 119
15  libcoreroutine.dylib            0x000000010e3860b8 -[RTDefaultsManager objectForKey:] + 225
16  libcoreroutine.dylib            0x000000010e3f3530 __62-[RTRoomSenseManager updateValueForKey:expectedClass:handler:]_block_invoke + 68
17  libdispatch.dylib               0x0000000113567808 _dispatch_call_block_and_release + 12
18  libdispatch.dylib               0x000000011358912e _dispatch_client_callout + 8
19  libdispatch.dylib               0x000000011356e4cf _dispatch_queue_serial_drain + 1018
20  libdispatch.dylib               0x000000011356ec9f _dispatch_queue_invoke + 1118
21  libdispatch.dylib               0x000000011356f047 _dispatch_queue_override_invoke + 376
22  libdispatch.dylib               0x00000001135709dc _dispatch_root_queue_drain + 506
23  libdispatch.dylib               0x0000000113570782 _dispatch_worker_thread3 + 113
24  libsystem_pthread.dylib         0x0000000113935712 _pthread_wqthread + 1299
25  libsystem_pthread.dylib         0x00000001139351ed start_wqthread + 13

Thread 4:: Dispatch queue: RTDefaultsManager-0x7fd26d50ec80-ServiceQueue
0   libsystem_kernel.dylib          0x0000000113900cb6 __psynch_mutexwait + 10
1   libsystem_pthread.dylib         0x0000000113935f6a _pthread_mutex_lock_wait + 100
2   com.apple.CoreFoundation        0x000000010f0e8858 -[CFPrefsSearchListSource alreadylocked_copyDictionary] + 312
3   com.apple.CoreFoundation        0x000000010f0e854c -[CFPrefsSearchListSource alreadylocked_copyValueForKey:] + 60
4   com.apple.CoreFoundation        0x000000010f1cf045 -[CFPrefsSource copyValueForKey:] + 53
5   com.apple.CoreFoundation        0x000000010f1f5640 __76-[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:]_block_invoke + 32
6   com.apple.CoreFoundation        0x000000010f20a702 __108-[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:]_block_invoke + 322
7   com.apple.CoreFoundation        0x000000010f209f09 normalizeQuintuplet + 329
8   com.apple.CoreFoundation        0x000000010f20a5b8 -[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:] + 104
9   com.apple.CoreFoundation        0x000000010f1f55a6 -[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:] + 310
10  com.apple.Foundation            0x000000010e6cc69b -[NSUserDefaults(NSUserDefaults) objectForKey:] + 43
11  libcoreroutine.dylib            0x000000010e386602 -[RTDefaultsManager _objectForKey:] + 169
12  libcoreroutine.dylib            0x000000010e38612b __34-[RTDefaultsManager objectForKey:]_block_invoke + 30
13  libdispatch.dylib               0x000000011358912e _dispatch_client_callout + 8
14  libdispatch.dylib               0x0000000113571d3f _dispatch_non_barrier_sync_f_invoke + 119
15  libcoreroutine.dylib            0x000000010e3860b8 -[RTDefaultsManager objectForKey:] + 225
16  libcoreroutine.dylib            0x000000010e3ebc16 __76-[RTPredictionControllerRoomAssist updateValueForKey:expectedClass:handler:]_block_invoke + 83
17  libdispatch.dylib               0x0000000113567808 _dispatch_call_block_and_release + 12
18  libdispatch.dylib               0x000000011358912e _dispatch_client_callout + 8
19  libdispatch.dylib               0x000000011356e4cf _dispatch_queue_serial_drain + 1018
20  libdispatch.dylib               0x000000011356ec9f _dispatch_queue_invoke + 1118
21  libdispatch.dylib               0x000000011356f047 _dispatch_queue_override_invoke + 376
22  libdispatch.dylib               0x00000001135709dc _dispatch_root_queue_drain + 506
23  libdispatch.dylib               0x0000000113570782 _dispatch_worker_thread3 + 113
24  libsystem_pthread.dylib         0x0000000113935712 _pthread_wqthread + 1299
25  libsystem_pthread.dylib         0x00000001139351ed start_wqthread + 13

Thread 5 Crashed:: Dispatch queue: RTMigrationManager-0x7fd26d50fe00
0   libsystem_kernel.dylib          0x0000000113900dd6 __pthread_kill + 10
1   libsystem_pthread.dylib         0x0000000113938787 pthread_kill + 90
2   libsystem_c.dylib               0x000000011367afd7 abort + 129
3   libcoreroutine.dylib            0x000000010e455926 -[RTMigrationManager abortDueToFatalMigrationError] + 247
4   libcoreroutine.dylib            0x000000010e45560e __48-[RTMigrationManager _finishMigrationWithError:]_block_invoke.174 + 290
5   libdispatch.dylib               0x0000000113567808 _dispatch_call_block_and_release + 12
6   libdispatch.dylib               0x000000011358912e _dispatch_client_callout + 8
7   libdispatch.dylib               0x000000011356e4cf _dispatch_queue_serial_drain + 1018
8   libdispatch.dylib               0x000000011356ec9f _dispatch_queue_invoke + 1118
9   libdispatch.dylib               0x000000011356f047 _dispatch_queue_override_invoke + 376
10  libdispatch.dylib               0x00000001135709dc _dispatch_root_queue_drain + 506
11  libdispatch.dylib               0x0000000113570782 _dispatch_worker_thread3 + 113
12  libsystem_pthread.dylib         0x0000000113935712 _pthread_wqthread + 1299
13  libsystem_pthread.dylib         0x00000001139351ed start_wqthread + 13

Thread 6:
0   libsystem_kernel.dylib          0x00000001139014e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib         0x0000000113935791 _pthread_wqthread + 1426
2   libsystem_pthread.dylib         0x00000001139351ed start_wqthread + 13

Thread 7:
0   libsystem_kernel.dylib          0x00000001139014e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib         0x0000000113935791 _pthread_wqthread + 1426
2   libsystem_pthread.dylib         0x00000001139351ed start_wqthread + 13

Thread 5 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x0000000000000006  rcx: 0x000070000f1b5b98  rdx: 0x0000000000000000
  rdi: 0x0000000000004703  rsi: 0x0000000000000006  rbp: 0x000070000f1b5bc0  rsp: 0x000070000f1b5b98
   r8: 0x000000000000000a   r9: 0x00007fd26d7533f0  r10: 0x000000000c000000  r11: 0x0000000000000202
  r12: 0x000000010ec1bd20  r13: 0x000000010ec1bd20  r14: 0x000070000f1b6000  r15: 0x000000010ec1eac0
  rip: 0x0000000113900dd6  rfl: 0x0000000000000202  cr2: 0x0000000116978000

Logical CPU:     0
Error Code:      0x02000148
Trap Number:     133

Binary Images:
     ...
********(REMOVED THIS SECTION TO FIT POST UNDER THE 30,000 CHARACTER LIMIT)

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 1541
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=135.2M resident=0K(0%) swapped_out_or_unallocated=135.2M(100%)
Writable regions: Total=62.3M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=62.3M(100%)

                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Activity Tracing                   256K        2 
Dispatch continuations            8192K        2 
Kernel Alloc Once                    8K        2 
MALLOC                            41.5M       20 
MALLOC guard page                   48K       10 
SQLite page cache                   64K        2 
STACK GUARD                       56.0M        9 
Stack                             11.1M        9 
VM_ALLOCATE                         20K        3 
__DATA                            14.5M      207 
__LINKEDIT                        31.4M      313 
__TEXT                           104.3M      166 
__UNICODE                          556K        2 
mapped file                       25.1M        8 
shared memory                       32K        5 
===========                     =======  ======= 
TOTAL                            293.0M      745 

Model: iMac11,3, BootROM IM112.0057.B03, 2 processors, Intel Core i3, 3.2 GHz, 16 GB, SMC 1.59f2
Graphics: ATI Radeon HD 5670, ATI Radeon HD 5670, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x859B, 0x435434473353313333394D2E43313646314B
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x859B, 0x435434473353313333394D2E43313646314B
Memory Module: BANK 0/DIMM1, 4 GB, DDR3, 1333 MHz, 0x859B, 0x435434473353313333394D2E43313646314B
Memory Module: BANK 1/DIMM1, 4 GB, DDR3, 1333 MHz, 0x859B, 0x435434473353313333394D2E43313646314B
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.74.0-P2P
Bluetooth: Version 5.0.2d9, 3 services, 27 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST31000528AS, 1 TB
Serial ATA Device: OPTIARC DVD RW AD-5680H
USB Device: USB 2.0 Bus
USB Device: Hub
USB Device: iPhone
USB Device: IR Receiver
USB Device: Built-in iSight
USB Device: USB 2.0 Bus
USB Device: Hub
USB Device: Card Reader
USB Device: BRCM2046 Hub
USB Device: Bluetooth USB Host Controller
Thunderbolt Bus:

A:

The issue has been resolved. I updated to the latest Version 8.2 beta (8C30a) and all works. Not really an answer as still don't know the cause.   

