OBS crashing before startup on MacBook Pro

[Mellowax]

Hi guys,

I have a weird error.
I bought a new MacBook Pro to do my DJing to have my old MacBook Pro (Late 2013) just work as a streaming Machine with OBS.

So I reset the whole MacBook to have a clean system but as I start OBS it instantly crashes. I have already tried several older versions - no chance.
The weird thing is, that before I reset the system it worked without these problems.
Here you see the MacOS error message, as there is no OBS log generated at all:

Process: obs [1530]
Path: /Volumes/*/OBS.app/Contents/MacOS/obs
Identifier: com.obsproject.obs-studio
Version: 26.0.2 (26.0.2)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: obs [1530]
User ID: 501

Date/Time: 2020-10-22 13:27:55.887 +0200
OS Version: Mac OS X 10.15.7 (19H2)
Report Version: 12
Anonymous UUID: E9EE6425-DF9D-4E40-B7B7-0AFEB42C510E

Sleep/Wake UUID: 0CDF3403-0401-41CD-A992-D3099D2AC641

Time Awake Since Boot: 2200 seconds
Time Since Wake: 590 seconds

System Integrity Protection: enabled

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

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

Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [1530]

VM Regions Near 0:
-->
Kernel Alloc Once 000000000625a000-000000000625c000 [ 8K] rw-/rwx SM=PRV

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 advanced-scene-switcher.so 0x0000000027338d82 SwitcherData::saveGeneralSettings(obs_data*) + 818
1 advanced-scene-switcher.so 0x0000000027300791 SaveSceneSwitcher(obs_data*, bool, void*) + 257
2 com.obsproject.obs-studio 0x00000001062846ed OBSStudioAPI::on_save(obs_data*) + 61
3 com.obsproject.obs-studio 0x0000000106293be6 OBSBasic::Save(char const*) + 1318
4 com.obsproject.obs-studio 0x00000001062a034b OBSBasic::SaveProjectDeferred() + 203
5 com.obsproject.obs-studio 0x0000000106353b09 OBSBasic::RefreshSceneCollections() + 569
6 com.obsproject.obs-studio 0x000000010629a1fd OBSBasic::OBSInit() + 2221
7 com.obsproject.obs-studio 0x00000001062767c3 OBSApp::OBSInit() + 499
8 com.obsproject.obs-studio 0x000000010627a5c7 main + 5287
9 libdyld.dylib 0x00007fff6adaecc9 start + 1

Thread 1:
0 libsystem_pthread.dylib 0x00007fff6afaeb68 start_wqthread + 0

Thread 2:
0 libsystem_pthread.dylib 0x00007fff6afaeb68 start_wqthread + 0

Thread 3:
0 libsystem_pthread.dylib 0x00007fff6afaeb68 start_wqthread + 0

Thread 4:
0 libsystem_pthread.dylib 0x00007fff6afaeb68 start_wqthread + 0

Thread 5:
0 libsystem_kernel.dylib 0x00007fff6aef2882 __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff6afb3425 _pthread_cond_wait + 698
2 libobs.0.dylib 0x0000000109042c60 os_event_timedwait + 176
3 libobs.0.dylib 0x000000010907aece obs_hotkey_thread + 174
4 libsystem_pthread.dylib 0x00007fff6afb3109 _pthread_start + 148
5 libsystem_pthread.dylib 0x00007fff6afaeb8b thread_start + 15

Thread 6:: audio-io: audio thread
0 libsystem_kernel.dylib 0x00007fff6aef2756 __semwait_signal + 10
1 libsystem_c.dylib 0x00007fff6ae75eea nanosleep + 196
2 libsystem_c.dylib 0x00007fff6ae75de4 usleep + 53
3 libobs.0.dylib 0x000000010902ee02 audio_thread + 418
4 libsystem_pthread.dylib 0x00007fff6afb3109 _pthread_start + 148
5 libsystem_pthread.dylib 0x00007fff6afaeb8b thread_start + 15

Thread 7:: video-io: video thread
0 libsystem_kernel.dylib 0x00007fff6aeefe36 semaphore_wait_trap + 10
1 libobs.0.dylib 0x0000000109042e00 os_sem_wait + 16
2 libobs.0.dylib 0x000000010902d54b video_thread + 75
3 libsystem_pthread.dylib 0x00007fff6afb3109 _pthread_start + 148
4 libsystem_pthread.dylib 0x00007fff6afaeb8b thread_start + 15

Thread 8:: libobs: graphics thread
0 libsystem_kernel.dylib 0x00007fff6aef2756 __semwait_signal + 10
1 libsystem_c.dylib 0x00007fff6ae75eea nanosleep + 196
2 libobs.0.dylib 0x00000001090430dd os_sleepto_ns + 93
3 libobs.0.dylib 0x0000000109094777 obs_graphics_thread_loop + 4295
4 libobs.0.dylib 0x0000000109041efa obs_graphics_thread_loop_autorelease + 26
5 libobs.0.dylib 0x0000000109094e48 obs_graphics_thread + 248
6 libobs.0.dylib 0x0000000109041eca obs_graphics_thread_autorelease + 26
7 libsystem_pthread.dylib 0x00007fff6afb3109 _pthread_start + 148
8 libsystem_pthread.dylib 0x00007fff6afaeb8b thread_start + 15

Thread 9:
0 libsystem_kernel.dylib 0x00007fff6aeefe36 semaphore_wait_trap + 10
1 libobs.0.dylib 0x0000000109042e00 os_sem_wait + 16
2 libobs-scripting.dylib 0x000000001d631c09 defer_thread + 25
3 libsystem_pthread.dylib 0x00007fff6afb3109 _pthread_start + 148
4 libsystem_pthread.dylib 0x00007fff6afaeb8b thread_start + 15

Thread 10:
0 libsystem_kernel.dylib 0x00007fff6aef80fe __select + 10
1 libcurl.4.dylib 0x000000010893da4f Curl_select + 97
2 libcurl.4.dylib 0x000000010893e0d1 Curl_poll + 517
3 libcurl.4.dylib 0x0000000108935b28 Curl_multi_wait + 715
4 libcurl.4.dylib 0x0000000108935ca9 curl_multi_poll + 26
5 libcurl.4.dylib 0x0000000108916e23 curl_easy_perform + 270
6 rtmp-services.so 0x0000000027184ac4 do_http_request + 324
7 rtmp-services.so 0x00000000271841d9 update_thread + 1305
8 libsystem_pthread.dylib 0x00007fff6afb3109 _pthread_start + 148
9 libsystem_pthread.dylib 0x00007fff6afaeb8b thread_start + 15

Thread 11:: AMCP Logging Spool
0 libsystem_kernel.dylib 0x00007fff6aeefe36 semaphore_wait_trap + 10
1 com.apple.audio.caulk 0x00007fff64982b16 caulk::mach::semaphore::wait() + 16
2 com.apple.audio.caulk 0x00007fff649829b2 caulk::semaphore::timed_wait(double) + 106
3 com.apple.audio.caulk 0x00007fff649827c4 caulk::concurrent::details::worker_thread::run() + 30
4 com.apple.audio.caulk 0x00007fff649821e4 void* caulk::thread_proxy<std::__1::tuple<caulk::thread::attributes, void (caulk::concurrent::details::worker_thread::*)(), std::__1::tuple<caulk::concurrent::details::worker_thread*> > >(void*) + 45
5 libsystem_pthread.dylib 0x00007fff6afb3109 _pthread_start + 148
6 libsystem_pthread.dylib 0x00007fff6afaeb8b thread_start + 15

Thread 12:
0 libsystem_kernel.dylib 0x00007fff6aeefe36 semaphore_wait_trap + 10
1 com.apple.audio.caulk 0x00007fff64982b16 caulk::mach::semaphore::wait() + 16
2 com.apple.audio.caulk 0x00007fff649829b2 caulk::semaphore::timed_wait(double) + 106
3 com.apple.audio.caulk 0x00007fff649827c4 caulk::concurrent::details::worker_thread::run() + 30
4 com.apple.audio.caulk 0x00007fff649821e4 void* caulk::thread_proxy<std::__1::tuple<caulk::thread::attributes, void (caulk::concurrent::details::worker_thread::*)(), std::__1::tuple<caulk::concurrent::details::worker_thread*> > >(void*) + 45
5 libsystem_pthread.dylib 0x00007fff6afb3109 _pthread_start + 148
6 libsystem_pthread.dylib 0x00007fff6afaeb8b thread_start + 15

Thread 13:
0 libsystem_kernel.dylib 0x00007fff6aeefe4e semaphore_timedwait_trap + 10
1 libdispatch.dylib 0x00007fff6ad55b6b _dispatch_sema4_timedwait + 76
2 libdispatch.dylib 0x00007fff6ad55f97 _dispatch_semaphore_wait_slow + 58
3 libdispatch.dylib 0x00007fff6ad63795 _dispatch_worker_thread + 284
4 libsystem_pthread.dylib 0x00007fff6afb3109 _pthread_start + 148
5 libsystem_pthread.dylib 0x00007fff6afaeb8b thread_start + 15

Thread 14:: com.apple.audio.IOThread.client
0 libsystem_kernel.dylib 0x00007fff6aeefdfa mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff6aef0170 mach_msg + 60
2 com.apple.audio.CoreAudio 0x00007fff304b56c5 invocation function for block in HALC_ProxyIOContext::HALC_ProxyIOContext(unsigned int, unsigned int) + 546
3 com.apple.audio.CoreAudio 0x00007fff305e9c22 HALB_IOThread::Entry(void*) + 72
4 libsystem_pthread.dylib 0x00007fff6afb3109 _pthread_start + 148
5 libsystem_pthread.dylib 0x00007fff6afaeb8b thread_start + 15

Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000000 rbx: 0x0000000000000000 rcx: 0x0000000000000000 rdx: 0x0000000000000008
rdi: 0x00007ffee99b4378 rsi: 0x000000002735bcc6 rbp: 0x00007ffee99b44a0 rsp: 0x00007ffee99b4430
r8: 0x0000000000000068 r9: 0x0000000000000002 r10: 0x0000000000000000 r11: 0xffffe001170b49b0
r12: 0x0000000000000003 r13: 0x000060000280cb60 r14: 0x0000600002875d20 r15: 0x00000000273649c8
rip: 0x0000000027338d82 rfl: 0x0000000000010202 cr2: 0x0000000000000000

Logical CPU: 6
Error Code: 0x00000004 (no mapping for user data read)
Trap Number: 14


VM Region Summary:
ReadOnly portion of Libraries: Total=944.2M resident=0K(0%) swapped_out_or_unallocated=944.2M(100%)
Writable regions: Total=640.3M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=640.3M(100%)

VIRTUAL REGION
REGION TYPE SIZE COUNT (non-coalesced)
=========== ======= =======
Accelerate framework 256K 2
Activity Tracing 256K 1
CG image 260K 1
CoreServices 32K 1
Foundation 4K 1
Kernel Alloc Once 8K 1
MALLOC 224.2M 80
MALLOC guard page 32K 7
MALLOC_LARGE (reserved) 320K 2 reserved VM address space (unallocated)
MALLOC_NANO (reserved) 384.0M 1 reserved VM address space (unallocated)
OpenGL GLSL 256K 3
PROTECTED_MEMORY 4K 1
STACK GUARD 56.1M 15
Stack 15.1M 15
VM_ALLOCATE 3136K 30
__DATA 74.6M 506
__DATA_CONST 485K 15
__FONT_DATA 4K 1
__GLSLBUILTINS 5176K 1
__LINKEDIT 406.9M 95
__OBJC_RO 32.3M 1
__OBJC_RW 1908K 2
__TEXT 537.5M 474
__UNICODE 564K 1
mapped file 357.3M 23
shared memory 636K 14
=========== ======= =======
TOTAL 2.1G 1294
TOTAL, minus reserved VM space 1.7G 1294

(I have shortened this message as it was too long.)
Is this error known or is there a workaround maybe?


Kind regards

 

[Mellowax]

Update:

I also face this crash on my new MacBook Pro.

Is this a known bug? Can you give me any hint what might be the problem from the Crashlog?

 

[Warmuptill]

This crash is caused the advanced scene switcher plugin it seems. This is not the fault of OBS.
Please either remove the plugin or update to a newer version of the plugin to see if that fixes it.

If there are certain steps to reliably reproduce the problem please let me know.

 

[Outra]

Sorry, you probably have your issue already solved by now. But I used to have a similar bug and I think it may be of help for other people to share the way I managed to solve it. It was quite simple, though.

There was a corrupted file among the ones OBS was trying to read at startup, and then it would crash even before generating a log. Instead of trying a solution via OBS troubleshooting, I tried via Mac troubleshooting, and it worked. How? Hold the Shift key while clicking OBS icon. That's all. I think (just *think*, I may be wrong) this method either resets or restores the corrupted and/or missing files to the original configuration without ereasing the user's customisation (I haven't lost any scene I had settled, even though I deleted the folder in ~/Library/Application Support/obs-studio/scene).

After doing this I checked the OBS folders in Library and in Content and everything is magically there again. I coudn't figure out what this method does, actually. But it worked in my case. I can't guarantee that you won't lose your settings doing this. That would be better to have a backup done before trying this.