diff --git a/Docs/Whats_New.md b/Docs/Whats_New.md
index 201d483c3..2308d5d67 100644
--- a/Docs/Whats_New.md
+++ b/Docs/Whats_New.md
@@ -16,24 +16,33 @@ Copyright (c) 2015-2023 [The Brenwill Workshop Ltd.](http://www.brenwill.com)
 MoltenVK 1.2.6
 --------------
 
-Released TBD
+Released 2023/10/17
 
 - Add support for extensions:
 	- `VK_KHR_synchronization2`
 	- `VK_EXT_extended_dynamic_state` *(requires Metal 3.1 for `VK_DYNAMIC_STATE_VERTEX_INPUT_BINDING_STRIDE`)*
 	- `VK_EXT_extended_dynamic_state2`
-- Fix rare case where vertex attribute buffers are not bound to Metal 
-  when no other bindings change between pipelines.
+- Fix rare case where vertex attribute buffers are not bound to Metal when no other bindings change between pipelines.
 - Ensure objects retained for life of `MTLCommandBuffer` during `vkCmdBlitImage()` & `vkQueuePresentKHR()`.
 - Fix case where a `CAMetalDrawable` with invalid pixel format causes onscreen flickering.
-- Fix MSL code used in `vkCmdBlitImage()` on depth-stencil formats. 
+- Fix deadlock when reporting debug message on `MVKInstance` destruction.
+- Fix MSL code used in `vkCmdBlitImage()` on depth-stencil formats.
 - Improve behavior of swapchain image presentation stalls caused by Metal regression.
-- Add several additional performance trackers, available via logging, or the `mvk_private_api.h` API.
+- `VkPhysicalDeviceLimits::timestampPeriod` set to 1.0 on Apple GPUs, and calculated dynamically on non-Apple GPUs.
 - Add `MVKConfiguration::timestampPeriodLowPassAlpha` and environment variable 
   `MVK_CONFIG_TIMESTAMP_PERIOD_LOWPASS_ALPHA`, to add a configurable lowpass filter 
   for varying `VkPhysicalDeviceLimits::timestampPeriod` on non-Apple GPUs.
+- Add several additional performance trackers, available via logging, or the `mvk_private_api.h` API.
 - Deprecate `MVK_DEBUG` env var, and add `MVK_CONFIG_DEBUG` env var to replace it. 
 - Update `MVK_CONFIGURATION_API_VERSION` and `MVK_PRIVATE_API_VERSION` to `38`.
+- Update dependency libraries to match _Vulkan SDK 1.3.268_.
+- Update to latest SPIRV-Cross:
+  - MSL: Workaround Metal 3.1 regression bug on recursive input structs.
+  - MSL: fix extraction of global variables, in case of atomics.
+  - MSL: Workaround bizarre crash on macOS.
+  - MSL: runtime array over argument buffers.
+  - MSL: Make rw texture fences optional.
+  - MSL: Prevent RAW hazards on read_write textures.
 
 
 
diff --git a/ExternalRevisions/SPIRV-Cross_repo_revision b/ExternalRevisions/SPIRV-Cross_repo_revision
index 590969e2f..fa4ca5201 100644
--- a/ExternalRevisions/SPIRV-Cross_repo_revision
+++ b/ExternalRevisions/SPIRV-Cross_repo_revision
@@ -1 +1 @@
-bccaa94db814af33d8ef05c153e7c34d8bd4d685
+2de1265fca722929785d9acdec4ab728c47a0254
diff --git a/ExternalRevisions/Vulkan-Headers_repo_revision b/ExternalRevisions/Vulkan-Headers_repo_revision
index a8ebecec5..e37595bdd 100644
--- a/ExternalRevisions/Vulkan-Headers_repo_revision
+++ b/ExternalRevisions/Vulkan-Headers_repo_revision
@@ -1 +1 @@
-85c2334e92e215cce34e8e0ed8b2dce4700f4a50
+7b3466a1f47a9251ac1113efbe022ff016e2f95b
diff --git a/ExternalRevisions/Vulkan-Tools_repo_revision b/ExternalRevisions/Vulkan-Tools_repo_revision
index bf77fda05..6ecf5015e 100644
--- a/ExternalRevisions/Vulkan-Tools_repo_revision
+++ b/ExternalRevisions/Vulkan-Tools_repo_revision
@@ -1 +1 @@
-300d9bf6b3cf7b237ee5e2c1d0ae10b9236f82d3
+1532001f7edae559af1988293eec90bc5e2607d5
diff --git a/ExternalRevisions/glslang_repo_revision b/ExternalRevisions/glslang_repo_revision
index aba7fbb10..cd54f4f32 100644
--- a/ExternalRevisions/glslang_repo_revision
+++ b/ExternalRevisions/glslang_repo_revision
@@ -1 +1 @@
-76b52ebf77833908dc4c0dd6c70a9c357ac720bd
+be564292f00c5bf0d7251c11f1c9618eb1117762
diff --git a/MoltenVK/MoltenVK/GPUObjects/MVKPipeline.mm b/MoltenVK/MoltenVK/GPUObjects/MVKPipeline.mm
index 2f8a299ed..49399b063 100644
--- a/MoltenVK/MoltenVK/GPUObjects/MVKPipeline.mm
+++ b/MoltenVK/MoltenVK/GPUObjects/MVKPipeline.mm
@@ -1734,6 +1734,7 @@ static MTLVertexFormat mvkAdjustFormatVectorToSize(MTLVertexFormat format, uint3
     shaderConfig.options.mslOptions.multiview = mvkIsMultiview(pRendInfo->viewMask);
     shaderConfig.options.mslOptions.multiview_layered_rendering = getPhysicalDevice()->canUseInstancingForMultiview();
     shaderConfig.options.mslOptions.view_index_from_device_index = mvkAreAllFlagsEnabled(pCreateInfo->flags, VK_PIPELINE_CREATE_VIEW_INDEX_FROM_DEVICE_INDEX_BIT);
+	shaderConfig.options.mslOptions.replace_recursive_inputs = mvkOSVersionIsAtLeast(14.0, 17.0, 1.0);
 #if MVK_MACOS
     shaderConfig.options.mslOptions.emulate_subgroups = !_device->_pMetalFeatures->simdPermute;
 #endif
@@ -2139,6 +2140,7 @@ static MTLVertexFormat mvkAdjustFormatVectorToSize(MTLVertexFormat format, uint3
     shaderConfig.options.mslOptions.buffer_size_buffer_index = _bufferSizeBufferIndex.stages[kMVKShaderStageCompute];
 	shaderConfig.options.mslOptions.dynamic_offsets_buffer_index = _dynamicOffsetBufferIndex.stages[kMVKShaderStageCompute];
     shaderConfig.options.mslOptions.indirect_params_buffer_index = _indirectParamsIndex.stages[kMVKShaderStageCompute];
+	shaderConfig.options.mslOptions.replace_recursive_inputs = mvkOSVersionIsAtLeast(14.0, 17.0, 1.0);
 
     MVKMTLFunction func = ((MVKShaderModule*)pSS->module)->getMTLFunction(&shaderConfig, pSS->pSpecializationInfo, this, pStageFB);
 	if ( !func.getMTLFunction() ) {
diff --git a/MoltenVKShaderConverter/MoltenVKShaderConverterTool/MoltenVKShaderConverterTool.cpp b/MoltenVKShaderConverter/MoltenVKShaderConverterTool/MoltenVKShaderConverterTool.cpp
index 9a911e3de..2eb1c48c8 100644
--- a/MoltenVKShaderConverter/MoltenVKShaderConverterTool/MoltenVKShaderConverterTool.cpp
+++ b/MoltenVKShaderConverter/MoltenVKShaderConverterTool/MoltenVKShaderConverterTool.cpp
@@ -221,6 +221,7 @@ bool MoltenVKShaderConverterTool::convertSPIRV(const vector<uint32_t>& spv,
 	mslContext.options.mslOptions.argument_buffers = _useMetalArgumentBuffers;
 	mslContext.options.mslOptions.force_active_argument_buffer_resources = _useMetalArgumentBuffers;
 	mslContext.options.mslOptions.pad_argument_buffer_resources = _useMetalArgumentBuffers;
+	mslContext.options.mslOptions.replace_recursive_inputs = mvkOSVersionIsAtLeast(14.0, 17.0, 1.0);
 
 	SPIRVToMSLConverter spvConverter;
 	spvConverter.setSPIRV(spv);
diff --git a/Templates/spirv-tools/build.zip b/Templates/spirv-tools/build.zip
index 3879c9b83..d087d8e2b 100644
Binary files a/Templates/spirv-tools/build.zip and b/Templates/spirv-tools/build.zip differ