这是错误消息：
/BuildRoot/Library/Caches/com.apple.xbs/Sources/Metal/Metal-55.2.6.1/Framework/MTLRenderPipeline.mm:1006：断言失败`渲染目标0启用了混合;但是，此渲染目标的pixelformat MTLPixelFormatRGBA32Float不可混合。＆＃39;
xcode中的stacktrace show是：
Thread 1Queue : com.apple.main-thread (serial)
#0 0x230e5c84 in __pthread_kill ()
#1 0x23187b46 in pthread_kill ()
#2 0x2307c0c4 in abort ()
#3 0x2305b8b6 in __assert_rtn ()
#4 0x24e13f64 in MTLReportFailure ()
#5 0x24e133ac in -[MTLRenderPipelineDescriptorInternal validateWithDevice:] ()
#6 0x0a65c30e in ___lldb_unnamed_function437$$AGXMetalG5 ()
#7 0x0a66c20c in ___lldb_unnamed_function555$$AGXMetalG5 ()
#8 0x010e6a70 in GfxDeviceMetal::GetPipeline(GfxDeviceMetal::PipeKey const&) at /Users/builduser/buildslave/unity/build/Runtime/GfxDevice/metal/GfxDeviceMetal.mm:182
#9 0x010e82c4 in GfxDeviceMetal::SetupMetalPipeline(MetalVertexDecl const*, ChannelAssigns const&) at /Users/builduser/buildslave/unity/build/Runtime/GfxDevice/metal/GfxDeviceMetal.mm:729
#10 0x010e1394 in MetalVBO::DrawVBO(ChannelAssigns const&, unsigned int, unsigned int, GfxPrimitiveType, unsigned int, unsigned int) at /Users/builduser/buildslave/unity/build/Runtime/GfxDevice/metal/BuffersMetal.mm:251
#11 0x00de9614 in DrawUtil::DrawVBOMeshRaw(VBO&, Mesh&, ChannelAssigns const&, int, unsigned int) at /Users/builduser/buildslave/unity/build/Runtime/Graphics/DrawUtil.cpp:37
#12 0x00de965c in DrawUtil::DrawMeshRaw(ChannelAssigns const&, Mesh&, int) at /Users/builduser/buildslave/unity/build/Runtime/Graphics/DrawUtil.cpp:47
我无法理解这是什么意思以及如何解决问题。
感谢