Blender Discussions

[msymms]

Hi All,

   I have successfully installed a Vega 56 in my Mac Pro 2009.  I understand that this card has OpenCL, but Blender doesn't recognize that.  How do I go about getting Blender to use the card's GPU?

TIA

-mark

[irz]

There is no OpenCL in Blender under MacOS. It was deprecate. OpenCL/OpenGL are aged by apple. Only Metal will future.

[bsavery]

Actually this statement is technically incorrect.  "deprecated" does not removed.  It simply means there is no future development and a replacement (Metal) is suggested.

At any rate to OP.  You can use RPR with metal, blender itself will no longer allow cycles to use OpenCL in macOS

[msymms]

Thanks.   I do have RPR installed, but blender crashes when I try use it.  I am running High Sierra.

-mark

[bsavery]

Can you see what the error is when running RPR?  You can open a terminal and run 

/Applications/Blender.app/Contents/MacOS/Blender to get more debug info

[msymms]

I’ll get that tonight when I get home and post

[msymms]

This is what I get.  It crashes as soon as I select RPR as render engine.

I ran blender from the terminal with --debug option

# Blender 2.83.4, Commit date: 2020-08-05 06:00, Hash c113af82881a
bpy.context.scene.render.engine = 'RPR'  # Property

# backtrace
0   Blender                             0x00000001155b5377 BLI_system_backtrace + 55
1   Blender                             0x000000010f166ef8 sig_handle_crash + 392
2   libsystem_platform.dylib            0x00007fff7d98af5a _sigtramp + 26
3   Blender                             0x000000010f7b2ad5 Object_particle_systems_begin + 85
4   Blender                             0x000000010fcf0762 _ZN12_GLOBAL__N_125deg_iterator_objects_stepEP12BLI_IteratorPN3DEG6IDNodeE + 162
5   Blender                             0x000000010fcf0a5e DEG_iterator_objects_next + 606
6   Blender                             0x000000010f70cf75 Depsgraph_objects_next + 21
7   Blender                             0x000000010f865b78 pyrna_prop_collection_iter_next + 40
8   Blender                             0x00000001140d961a _PyEval_EvalFrameDefault + 24986
9   Blender                             0x00000001140171c2 gen_send_ex + 242
10  Blender                             0x00000001140d961a _PyEval_EvalFrameDefault + 24986
11  Blender                             0x00000001140171c2 gen_send_ex + 242
12  Blender                             0x0000000114011080 enum_next + 32
13  Blender                             0x00000001140d961a _PyEval_EvalFrameDefault + 24986
14  Blender                             0x00000001140de22d _PyEval_EvalCodeWithName + 3021
15  Blender                             0x0000000114007c57 _PyFunction_FastCallDict + 455
16  Blender                             0x00000001140091c3 _PyObject_Call_Prepend + 131
17  Blender                             0x00000001140082b8 PyObject_Call + 136
18  Blender                             0x00000001140da120 _PyEval_EvalFrameDefault + 27808
19  Blender                             0x000000011400867d function_code_fastcall + 237
20  Blender                             0x00000001140dd49c call_function + 780
21  Blender                             0x00000001140d9ede _PyEval_EvalFrameDefault + 27230
22  Blender                             0x000000011400867d function_code_fastcall + 237
23  Blender                             0x00000001140dd49c call_function + 780
24  Blender                             0x00000001140d9ede _PyEval_EvalFrameDefault + 27230
25  Blender                             0x000000011400867d function_code_fastcall + 237
26  Blender                             0x00000001140091c3 _PyObject_Call_Prepend + 131
27  Blender                             0x00000001140082b8 PyObject_Call + 136
28  Blender                             0x000000011416d2c7 t_bootstrap + 71
29  Blender                             0x00000001141210e9 pythread_wrapper + 25
30  libsystem_pthread.dylib             0x00007fff7d994661 _pthread_body + 340
31  libsystem_pthread.dylib             0x00007fff7d99450d _pthread_body + 0
32  libsystem_pthread.dylib             0x00007fff7d993bf9 thread_start + 13

And I get a SegFault 11. 

Does this help?

-mark

[bsavery]

Hmmm, this crash is completely inside blender, nothing to do with RPR.  Maybe try it without the --debug option

[msymms]

So, well i tried it from the CL with no options.  RPR worked fine and used the Vega.  I also tried running it from the applications folder and it works fine now as well.  Dunno.  But it is working.

Thanks.

-mark