Fix crash creating compute pipelines on macOS versions < 10.14
diff --git a/MoltenVK/MoltenVK/GPUObjects/MVKPipeline.mm b/MoltenVK/MoltenVK/GPUObjects/MVKPipeline.mm
index 6abce41..c2d5d79 100644
--- a/MoltenVK/MoltenVK/GPUObjects/MVKPipeline.mm
+++ b/MoltenVK/MoltenVK/GPUObjects/MVKPipeline.mm
@@ -1834,7 +1834,11 @@
if (mtlFunc) {
MTLComputePipelineDescriptor* plDesc = [MTLComputePipelineDescriptor new]; // temp retain
plDesc.computeFunction = mtlFunc;
- plDesc.maxTotalThreadsPerThreadgroup = _mtlThreadgroupSize.width * _mtlThreadgroupSize.height * _mtlThreadgroupSize.depth;
+ // Only available macOS 10.14+
+ if ([plDesc respondsToSelector:@selector(setMaxTotalThreadsPerThreadgroup:)])
+ {
+ plDesc.maxTotalThreadsPerThreadgroup = _mtlThreadgroupSize.width * _mtlThreadgroupSize.height * _mtlThreadgroupSize.depth;
+ }
plDesc.threadGroupSizeIsMultipleOfThreadExecutionWidth = mvkIsAnyFlagEnabled(pCreateInfo->stage.flags, VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT);
// Metal does not allow the name of the pipeline to be changed after it has been created,
