diff --git a/Docs/MoltenVK_Runtime_UserGuide.md b/Docs/MoltenVK_Runtime_UserGuide.md
index 059f8027..cf917bc0 100644
--- a/Docs/MoltenVK_Runtime_UserGuide.md
+++ b/Docs/MoltenVK_Runtime_UserGuide.md
@@ -255,6 +255,7 @@ In addition to the core *Vulkan* API, **MoltenVK**  also supports the following
 - `VK_EXT_host_query_reset`
 - `VK_EXT_memory_budget` *(requires Metal 2.0)*
 - `VK_EXT_metal_surface`
+- `VK_EXT_post_depth_coverage` *(iOS, requires GPU family 4)*
 - `VK_EXT_scalar_block_layout`
 - `VK_EXT_shader_stencil_export` *(requires Mac GPU family 2 or iOS GPU family 5)*
 - `VK_EXT_shader_viewport_index_layer`
diff --git a/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h b/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h
index 27bac91f..f5d029d7 100644
--- a/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h
+++ b/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h
@@ -539,6 +539,7 @@ typedef struct {
 	VkBool32 multisampleLayeredRendering;       /**< If true, layered rendering to multiple multi-sampled cube or texture array layers is supported. */
 	VkBool32 stencilFeedback;					/**< If true, fragment shaders that write to [[stencil]] outputs are supported. */
 	VkBool32 textureBuffers;					/**< If true, textures of type MTLTextureTypeBuffer are supported. */
+	VkBool32 postDepthCoverage;					/**< If true, coverage masks in fragment shaders post-depth-test are supported. */
 } MVKPhysicalDeviceMetalFeatures;
 
 /**
diff --git a/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm b/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
index 18dc47d3..2ca1daff 100644
--- a/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
+++ b/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
@@ -791,6 +791,10 @@ void MVKPhysicalDevice::initMetalFeatures() {
 		_metalFeatures.arrayOfSamplers = true;
 	}
 
+	if ( [_mtlDevice supportsFeatureSet: MTLFeatureSet_iOS_GPUFamily4_v1] ) {
+		_metalFeatures.postDepthCoverage = true;
+	}
+
 	if ( [_mtlDevice supportsFeatureSet: MTLFeatureSet_iOS_GPUFamily5_v1] ) {
 		_metalFeatures.layeredRendering = true;
 		_metalFeatures.stencilFeedback = true;
@@ -1616,6 +1620,9 @@ void MVKPhysicalDevice::initMemoryProperties() {
 }
 
 void MVKPhysicalDevice::initExtensions() {
+	if (!_metalFeatures.postDepthCoverage) {
+		_supportedExtensions.vk_EXT_post_depth_coverage.enabled = false;
+	}
 	if (!_metalFeatures.stencilFeedback) {
 		_supportedExtensions.vk_EXT_shader_stencil_export.enabled = false;
 	}
diff --git a/MoltenVK/MoltenVK/Layers/MVKExtensions.def b/MoltenVK/MoltenVK/Layers/MVKExtensions.def
index 3c8b08a0..3bb8f43b 100644
--- a/MoltenVK/MoltenVK/Layers/MVKExtensions.def
+++ b/MoltenVK/MoltenVK/Layers/MVKExtensions.def
@@ -59,6 +59,7 @@ MVK_EXTENSION(EXT_debug_utils, EXT_DEBUG_UTILS)
 MVK_EXTENSION(EXT_host_query_reset, EXT_HOST_QUERY_RESET)
 MVK_EXTENSION(EXT_memory_budget, EXT_MEMORY_BUDGET)
 MVK_EXTENSION(EXT_metal_surface, EXT_METAL_SURFACE)
+MVK_EXTENSION(EXT_post_depth_coverage, EXT_POST_DEPTH_COVERAGE)
 MVK_EXTENSION(EXT_scalar_block_layout, EXT_SCALAR_BLOCK_LAYOUT)
 MVK_EXTENSION(EXT_shader_stencil_export, EXT_SHADER_STENCIL_EXPORT)
 MVK_EXTENSION(EXT_shader_viewport_index_layer, EXT_SHADER_VIEWPORT_INDEX_LAYER)
diff --git a/MoltenVK/MoltenVK/Layers/MVKExtensions.mm b/MoltenVK/MoltenVK/Layers/MVKExtensions.mm
index 1ba1a703..d89e3227 100644
--- a/MoltenVK/MoltenVK/Layers/MVKExtensions.mm
+++ b/MoltenVK/MoltenVK/Layers/MVKExtensions.mm
@@ -50,6 +50,7 @@ static bool mvkIsSupportedOnPlatform(VkExtensionProperties* pProperties) {
 	if (pProperties == &kVkExtProps_EXT_MEMORY_BUDGET) {
 		return mvkOSVersion() >= 10.13;
 	}
+	if (pProperties == &kVkExtProps_EXT_POST_DEPTH_COVERAGE) { return false; }
 	if (pProperties == &kVkExtProps_EXT_SHADER_STENCIL_EXPORT) {
 		return mvkOSVersion() >= 10.14;
 	}
@@ -65,6 +66,9 @@ static bool mvkIsSupportedOnPlatform(VkExtensionProperties* pProperties) {
 	if (pProperties == &kVkExtProps_EXT_MEMORY_BUDGET) {
 		return mvkOSVersion() >= 11.0;
 	}
+	if (pProperties == &kVkExtProps_EXT_POST_DEPTH_COVERAGE) {
+		return mvkOSVersion() >= 11.0;
+	}
 	if (pProperties == &kVkExtProps_EXT_SHADER_STENCIL_EXPORT) {
 		return mvkOSVersion() >= 12.0;
 	}