System info:

Model: MacPro5,1, BootROM MP51.007F.B03, 6 processors, 6-Core Intel Xeon, 3.33 GHz, 12 GB, SMC 1.39f11
Graphics: NVIDIA GeForce GTX 760, NVIDIA GeForce GTX 760, PCIe, 4095 MB

dual monitors - probably the issue as discussed in this thread several months ago: https://steamcommunity.com/app/289130/discussions/0/341537388321746982/

Using 64-bit version installed fresh from steam today. Have tried disabling steam overlay, steam sync, -novideo launch option.

Player.log:

Initialize engine version: 5.3.6p1 (ef59fdfbd254)
GfxDevice: creating device client; threaded=1
OpenGL:
Version:  OpenGL 2.1 [2.1 NVIDIA-10.14.20 355.10.05.15f03]
Renderer: NVIDIA GeForce GTX 760 OpenGL Engine
Vendor:   NVIDIA Corporation
VRAM:     2048 MB
Extensions: GL_ARB_color_buffer_float GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_draw_buffers GL_ARB_draw_elements_base_vertex GL_ARB_draw_instanced GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB GL_ARB_half_float_pixel GL_ARB_half_float_vertex GL_ARB_imaging GL_ARB_instanced_arrays GL_ARB_multisample GL_ARB_multitexture GL_ARB_occlusion_query GL_ARB_pixel_buffer_object GL_ARB_point_parameters GL_ARB_point_sprite GL_ARB_provoking_vertex GL_ARB_seamless_cube_map GL_ARB_shader_objects GL_ARB_shader_texture_lod GL_ARB_shading_language_100 GL_ARB_shadow GL_ARB_sync GL_ARB_texture_border_clamp GL_ARB_texture_compression GL_ARB_texture_compression_rgtc GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar GL_ARB_texture_env_dot3 GL_ARB_texture_float GL_ARB_texture_mirrored_repeat GL_ARB_texture_non_power_of_two GL_ARB_texture_rectangle GL_ARB_texture_rg GL_ARB_transpose_matrix GL_ARB_vertex_array_bgra GL_ARB_vertex_blend GL_ARB_vertex_buffer_object GL_ARB_vertex_program GL_ARB_vertex_shader GL_ARB_window_pos GL_EXT_abgr GL_EXT_bgra GL_EXT_bindable_uniform GL_EXT_blend_color GL_EXT_blend_equation_separate GL_EXT_blend_func_separate GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_clip_volume_hint GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_depth_bounds_test GL_EXT_draw_buffers2 GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_framebuffer_object GL_EXT_framebuffer_sRGB GL_EXT_geometry_shader4 GL_EXT_gpu_program_parameters GL_EXT_gpu_shader4 GL_EXT_multi_draw_arrays GL_EXT_packed_depth_stencil GL_EXT_packed_float GL_EXT_provoking_vertex GL_EXT_rescale_normal GL_EXT_secondary_color GL_EXT_separate_specular_color GL_EXT_shadow_funcs GL_EXT_stencil_two_side GL_EXT_stencil_wrap GL_EXT_texture_array GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_s3tc GL_EXT_texture_env_add GL_EXT_texture_filter_anisotropic GL_EXT_texture_integer GL_EXT_texture_lod_bias GL_EXT_texture_mirror_clamp GL_EXT_texture_rectangle GL_EXT_texture_shared_exponent GL_EXT_texture_sRGB GL_EXT_texture_sRGB_decode GL_EXT_timer_query GL_EXT_transform_feedback GL_EXT_vertex_array_bgra GL_APPLE_aux_depth_stencil GL_APPLE_client_storage GL_APPLE_element_array GL_APPLE_fence GL_APPLE_float_pixels GL_APPLE_flush_buffer_range GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_packed_pixels GL_APPLE_pixel_buffer GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_specular_vector GL_APPLE_texture_range GL_APPLE_transform_hint GL_APPLE_vertex_array_object GL_APPLE_vertex_array_range GL_APPLE_vertex_point_size GL_APPLE_vertex_program_evaluators GL_APPLE_ycbcr_422 GL_ATI_separate_stencil GL_ATI_texture_env_combine3 GL_ATI_texture_float GL_ATI_texture_mirror_once GL_IBM_rasterpos_clip GL_NV_blend_square GL_NV_conditional_render GL_NV_depth_clamp GL_NV_fog_distance GL_NV_fragment_program_option GL_NV_fragment_program2 GL_NV_light_max_exponent GL_NV_multisample_filter_hint GL_NV_point_sprite GL_NV_texgen_reflection GL_NV_texture_barrier GL_NV_vertex_program2_option GL_NV_vertex_program3 GL_SGIS_generate_mipmap GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod
GL: Detected 2048 MB VRAM
Receiving unhandled NULL exception
Obtained 32 stack frames.
#0  0x007fffc6281f2b in objc_release
#1  0x000001010bdce7 in CreateGLGfxDevice()
#2  0x000001009f3020 in CreateRealGfxDevice(GfxDeviceRenderer, bool)
#3  0x00000101108169 in GfxDeviceWorker::Startup(GfxDeviceRenderer, bool, bool)
#4  0x000001010f869f in CreateClientGfxDevice(GfxDeviceRenderer, unsigned int)
#5  0x000001009f37b0 in InitializeGfxDevice(unsigned int)
#6  0x00000100acbb03 in InitializeEngineGraphics(bool)
#7  0x00000100aae9c2 in PlayerInitEngineGraphics(bool)
#8  0x000001010813a2 in SetupUnityPlayer(bool, int, char**)
#9  0x00000101084415 in -[PlayerAppDelegate applicationDidFinishLaunching:]
#10 0x007fffb15879fc in __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__
#11 0x007fffb15878fb in _CFXRegistrationPost
#12 0x007fffb1587662 in ___CFXNotificationPost_block_invoke
#13 0x007fffb1545d12 in -[_CFXNotificationRegistrar find:object:observer:enumerator:]
#14 0x007fffb1544cfb in _CFXNotificationPost
#15 0x007fffb2f88a37 in -[NSNotificationCenter postNotificationName:object:userInfo:]
#16 0x007fffaf2337e5 in -[NSApplication _postDidFinishNotification]
#17 0x007fffaf23354a in -[NSApplication _sendFinishLaunchingNotification]
#18 0x007fffaf0f68b3 in -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:]
#19 0x007fffaf0f6505 in -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:]
#20 0x007fffb2fd3ebd in -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:]
#21 0x007fffb2fd3d37 in _NSAppleEventManagerGenericHandler
#22 0x007fffb23d60da in aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*)
#23 0x007fffb23d5e51 in dispatchEventAndSendReply(AEDesc const*, AEDesc*)
#24 0x007fffb23d5d5d in aeProcessAppleEvent
#25 0x007fffb0b0d7bf in AEProcessAppleEvent
#26 0x007fffaf0f1dad in _DPSNextEvent
#27 0x007fffaf86c21f in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:]
#28 0x007fffaf0e6465 in -[NSApplication run]
#29 0x007fffaf0b0d80 in NSApplicationMain
#30 0x000001010821fe in PlayerMain(int, char const**)
#31 0x00000100001534 in start
Stacktrace:


Native stacktrace:

0   libsystem_kernel.dylib              0x00000001031fadd6 __pthread_kill + 10
1   libsystem_c.dylib                   0x0000000103108420 abort + 129
2   EndlessLegend                       0x0000000100b10334 _Z12HandleSignaliP9__siginfoPv + 36
3   libmono.0.dylib                     0x0000000102295c9e mono_chain_signal + 75
4   libmono.0.dylib                     0x00000001021de4be mono_sigsegv_signal_handler + 210
5   libsystem_platform.dylib            0x000000010333cbba _sigtramp + 26
6   CoreServices                        0x00007fffd41c3149 CoreServicesVersionNumber + 568283473
7   EndlessLegend                       0x00000001010bdce7 _Z17CreateGLGfxDevicev + 135
8   EndlessLegend                       0x00000001009f3020 _Z19CreateRealGfxDevice17GfxDeviceRendererb + 48
9   EndlessLegend                       0x0000000101108169 _ZN15GfxDeviceWorker7StartupE17GfxDeviceRendererbb + 25
10  EndlessLegend                       0x00000001010f869f _Z21CreateClientGfxDevice17GfxDeviceRendererj + 159
11  EndlessLegend                       0x00000001009f37b0 _Z19InitializeGfxDevicej + 320
12  EndlessLegend                       0x0000000100acbb03 _Z24InitializeEngineGraphicsb + 67
13  EndlessLegend                       0x0000000100aae9c2 _Z24PlayerInitEngineGraphicsb + 18
14  EndlessLegend                       0x00000001010813a2 _Z16SetupUnityPlayerbiPPc + 722
15  EndlessLegend                       0x0000000101084415 -[PlayerAppDelegate applicationDidFinishLaunching:] + 821
16  CoreFoundation                      0x00007fffb15879fc __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
17  CoreFoundation                      0x00007fffb15878fb _CFXRegistrationPost + 427
18  CoreFoundation                      0x00007fffb1587662 ___CFXNotificationPost_block_invoke + 50
19  CoreFoundation                      0x00007fffb1545d12 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 2018
20  CoreFoundation                      0x00007fffb1544cfb _CFXNotificationPost + 667
21  Foundation                          0x00007fffb2f88a37 -[NSNotificationCenter postNotificationName:object:userInfo:] + 66
22  AppKit                              0x00007fffaf2337e5 -[NSApplication _postDidFinishNotification] + 297
23  AppKit                              0x00007fffaf23354a -[NSApplication _sendFinishLaunchingNotification] + 208
24  AppKit                              0x00007fffaf0f68b3 -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] + 552
25  AppKit                              0x00007fffaf0f6505 -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 661
26  Foundation                          0x00007fffb2fd3ebd -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 290
27  Foundation                          0x00007fffb2fd3d37 _NSAppleEventManagerGenericHandler + 102
28  AE                                  0x00007fffb23d60da _Z20aeDispatchAppleEventPK6AEDescPS_jPh + 544
29  AE                                  0x00007fffb23d5e51 _ZL25dispatchEventAndSendReplyPK6AEDescPS_ + 39
30  AE                                  0x00007fffb23d5d5d aeProcessAppleEvent + 312
31  HIToolbox                           0x00007fffb0b0d7bf AEProcessAppleEvent + 55
32  AppKit                              0x00007fffaf0f1dad _DPSNextEvent + 1833
33  AppKit                              0x00007fffaf86c21f -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 2789
34  AppKit                              0x00007fffaf0e6465 -[NSApplication run] + 926
35  AppKit                              0x00007fffaf0b0d80 NSApplicationMain + 1237
36  EndlessLegend                       0x00000001010821fe _Z10PlayerMainiPPKc + 638
37  EndlessLegend                       0x0000000100001534 start + 52

Debug info from gdb:


=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================

pid 69163 != 69158, skipping destruction (fork without exec?)

Can provide OS X crash log if desired.