well I had high hopes but I crash hard ... saw the SEGA screen just once...  

Well I have gotten farther but it requires turning off the Steam Overlay (which I would recommend in any game)

Process:               EndlessSpace2 [82583]
Path:                  /Users/USER/Library/Application Support/Steam/*/EndlessSpace2.app/Contents/MacOS/EndlessSpace2
Identifier:            unity.Amplitude studios.Endless space 2
Version:               Unity Player version 5.5.1p4 (5.5.1p4)
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           EndlessSpace2 [82583]
User ID:               503

Date/Time:             2017-05-18 20:53:17.136 -0400
OS Version:            Mac OS X 10.12.4 (16E195)
Report Version:        12
Anonymous UUID:        470B99E9-7F90-E170-15A7-29D790BFC4E7


Time Awake Since Boot: 1500000 seconds

System Integrity Protection: enabled

Crashed Thread:        9  UnityGfxDeviceWorker

Exception Type:        EXC_BAD_ACCESS (SIGABRT)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

VM Regions Near 0:
-->
    __TEXT                 0000000100000000-000000010176b000 [ 23.4M] r-x/rwx SM=COW  /Users/USER/Library/Application Support/Steam/*/EndlessSpace2.app/Contents/MacOS/EndlessSpace2

Application Specific Information:
abort() called

Thread 0:: MainThrd  Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib            0x00007fffb67fd386 semaphore_wait_trap + 10
1   libdispatch.dylib                 0x00007fffb66b8a77 _os_semaphore_wait + 16
2   libdispatch.dylib                 0x00007fffb66a9891 _dispatch_semaphore_wait_slow + 103
3   unity.Amplitude studios.Endless space 2    0x0000000100d2f158 GfxDeviceClient::BeginFrame() + 88
4   unity.Amplitude studios.Endless space 2    0x0000000100529a58 PlayerRender(bool) + 200
5   unity.Amplitude studios.Endless space 2    0x000000010052b58a PlayerLoop() + 1226
6   unity.Amplitude studios.Endless space 2    0x0000000100cd5e3e -[PlayerAppDelegate UpdatePlayer] + 334
7   com.apple.Foundation              0x00007fffa2a05f3f __NSFireTimer + 83
8   com.apple.CoreFoundation          0x00007fffa0f7cd04 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
9   com.apple.CoreFoundation          0x00007fffa0f7c98f __CFRunLoopDoTimer + 1071
10  com.apple.CoreFoundation          0x00007fffa0f7c4ea __CFRunLoopDoTimers + 298
11  com.apple.CoreFoundation          0x00007fffa0f73c31 __CFRunLoopRun + 2065
12  com.apple.CoreFoundation          0x00007fffa0f731c4 CFRunLoopRunSpecific + 420
13  com.apple.HIToolbox               0x00007fffa04d4ebc RunCurrentEventLoopInMode + 240
14  com.apple.HIToolbox               0x00007fffa04d4cf1 ReceiveNextEventCommon + 432
15  com.apple.HIToolbox               0x00007fffa04d4b26 _BlockUntilNextEventMatchingListInModeWithFilter + 71
16  com.apple.AppKit                  0x00007fff9ea6fe24 _DPSNextEvent + 1120
17  com.apple.AppKit                  0x00007fff9f1eb85e -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 2796
18  com.apple.AppKit                  0x00007fff9ea647ab -[NSApplication run] + 926
19  com.apple.AppKit                  0x00007fff9ea2f1de NSApplicationMain + 1237
20  unity.Amplitude studios.Endless space 2    0x0000000100cd5b05 PlayerMain(int, char const**) + 629
21  unity.Amplitude studios.Endless space 2    0x0000000100002034 start + 52

Thread 1:
0   libsystem_kernel.dylib            0x00007fffb680544e __workq_kernreturn + 10
1   libsystem_pthread.dylib           0x00007fffb68ef695 _pthread_wqthread + 1426
2   libsystem_pthread.dylib           0x00007fffb68ef0f1 start_wqthread + 13

Thread 2:
0   libsystem_kernel.dylib            0x00007fffb680544e __workq_kernreturn + 10
1   libsystem_pthread.dylib           0x00007fffb68ef695 _pthread_wqthread + 1426
2   libsystem_pthread.dylib           0x00007fffb68ef0f1 start_wqthread + 13

Thread 3:
0   libsystem_kernel.dylib            0x00007fffb680544e __workq_kernreturn + 10
1   libsystem_pthread.dylib           0x00007fffb68ef695 _pthread_wqthread + 1426
2   libsystem_pthread.dylib           0x00007fffb68ef0f1 start_wqthread + 13

Thread 4:
0   libsystem_kernel.dylib            0x00007fffb680544e __workq_kernreturn + 10
1   libsystem_pthread.dylib           0x00007fffb68ef695 _pthread_wqthread + 1426
2   libsystem_pthread.dylib           0x00007fffb68ef0f1 start_wqthread + 13

Thread 5:
0   libsystem_kernel.dylib            0x00007fffb67fd386 semaphore_wait_trap + 10
1   libmono.0.dylib                   0x0000000101fefba8 mono_sem_wait + 35
2   libmono.0.dylib                   0x0000000101f43339 finalizer_thread + 127
3   libmono.0.dylib                   0x0000000101fb68e5 start_wrapper + 457
4   libmono.0.dylib                   0x0000000101fe690a thread_start_routine + 218
5   libmono.0.dylib                   0x000000010200cc66 GC_start_routine + 96
6   libsystem_pthread.dylib           0x00007fffb68ef9af _pthread_body + 180
7   libsystem_pthread.dylib           0x00007fffb68ef8fb _pthread_start + 286
8   libsystem_pthread.dylib           0x00007fffb68ef101 thread_start + 13

Thread 6:: BatchDeleteObjects
0   libsystem_kernel.dylib            0x00007fffb67fd386 semaphore_wait_trap + 10
1   libdispatch.dylib                 0x00007fffb66b8a77 _os_semaphore_wait + 16
2   libdispatch.dylib                 0x00007fffb66a9891 _dispatch_semaphore_wait_slow + 103
3   unity.Amplitude studios.Endless space 2    0x00000001005f29bb ThreadedStreamBuffer::HandleReadOverflow(unsigned int&, unsigned int&) + 299
4   unity.Amplitude studios.Endless space 2    0x0000000100510132 BatchDeleteStep2Threaded(void*) + 82
5   unity.Amplitude studios.Endless space 2    0x00000001005f138c Thread::RunThreadWrapper(void*) + 60
6   libsystem_pthread.dylib           0x00007fffb68ef9af _pthread_body + 180
7   libsystem_pthread.dylib           0x00007fffb68ef8fb _pthread_start + 286
8   libsystem_pthread.dylib           0x00007fffb68ef101 thread_start + 13

Thread 7:: AsyncReadManager
0   libsystem_kernel.dylib            0x00007fffb67fd386 semaphore_wait_trap + 10
1   libdispatch.dylib                 0x00007fffb66b8a77 _os_semaphore_wait + 16
2   libdispatch.dylib                 0x00007fffb66a9891 _dispatch_semaphore_wait_slow + 103
3   unity.Amplitude studios.Endless space 2    0x00000001003a5ad9 AsyncReadManagerThreaded::ThreadEntry() + 153
4   unity.Amplitude studios.Endless space 2    0x00000001003a5819 AsyncReadManagerThreaded::StaticThreadEntry(void*) + 9
5   unity.Amplitude studios.Endless space 2    0x00000001005f138c Thread::RunThreadWrapper(void*) + 60
6   libsystem_pthread.dylib           0x00007fffb68ef9af _pthread_body + 180
7   libsystem_pthread.dylib           0x00007fffb68ef8fb _pthread_start + 286
8   libsystem_pthread.dylib           0x00007fffb68ef101 thread_start + 13

Thread 8:: UnityLookForNewInputDevices
0   libsystem_kernel.dylib            0x00007fffb67fd34a mach_msg_trap + 10
1   libsystem_kernel.dylib            0x00007fffb67fc797 mach_msg + 55
2   com.apple.CoreFoundation          0x00007fffa0f744e4 __CFRunLoopServiceMachPort + 212
3   com.apple.CoreFoundation          0x00007fffa0f73971 __CFRunLoopRun + 1361
4   com.apple.CoreFoundation          0x00007fffa0f731c4 CFRunLoopRunSpecific + 420
5   com.apple.CoreFoundation          0x00007fffa0fb2c31 CFRunLoopRun + 97
6   unity.Amplitude studios.Endless space 2    0x0000000100ce5df0 LookForNewDevices(void*) + 320
7   unity.Amplitude studios.Endless space 2    0x00000001005f138c Thread::RunThreadWrapper(void*) + 60
8   libsystem_pthread.dylib           0x00007fffb68ef9af _pthread_body + 180
9   libsystem_pthread.dylib           0x00007fffb68ef8fb _pthread_start + 286
10  libsystem_pthread.dylib           0x00007fffb68ef101 thread_start + 13

Thread 9 Crashed:: UnityGfxDeviceWorker
0   libsystem_kernel.dylib            0x00007fffb6804d42 __pthread_kill + 10
1   libsystem_pthread.dylib           0x00007fffb68f25bf pthread_kill + 90
2   libsystem_c.dylib                 0x00007fffb676a420 abort + 129
3   libmono.0.dylib                   0x0000000101ecd4ef mono_handle_native_sigsegv + 726
4   libmono.0.dylib                   0x0000000101f16f19 sigabrt_signal_handler + 97
5   libsystem_platform.dylib          0x00007fffb68e5b3a _sigtramp + 26
6   unity.Amplitude studios.Endless space 2    0x0000000100000001 0x100000000 + 1
7   libsystem_c.dylib                 0x00007fffb676a420 abort + 129
8   unity.Amplitude studios.Endless space 2    0x00000001006a01d4 HandleSignal(int, __siginfo*, void*) + 36
9   libmono.0.dylib                   0x0000000101f16b4a mono_chain_signal + 75
10  libmono.0.dylib                   0x0000000101e5ebb7 mono_sigsegv_signal_handler + 147
11  libsystem_platform.dylib          0x00007fffb68e5b3a _sigtramp + 26
12  ???                               000000000000000000 0 + 0
13  gameoverlayrenderer.dylib         0x0000000101e2c0d4 COverlayGLRenderer::ValveSetDesiredRenderState() + 42
14  gameoverlayrenderer.dylib         0x0000000101e303fc CBaseOverlayRenderer::ReadRenderStream(IMemStream*) + 4368
15  gameoverlayrenderer.dylib         0x0000000101e3122f CBaseOverlayRenderer::RenderFrame() + 1973
16  gameoverlayrenderer.dylib         0x0000000101e2e870 COverlayGLRenderer::FlushDrawable(_CGLContextObject*) + 874
17  gameoverlayrenderer.dylib         0x0000000101e2e8c8 SteamCGLFlushDrawable(_CGLContextObject*) + 24
18  unity.Amplitude studios.Endless space 2    0x0000000100cf648a PresentContextGL(ObjectHandle<GraphicsContext_Tag, void*>) + 90
19  unity.Amplitude studios.Endless space 2    0x0000000100d0f19f GfxDeviceGLES::Pres