diff --git a/libs/vkd3d-shader/msl.c b/libs/vkd3d-shader/msl.c
index 26ffac9eb..9279b5ae5 100644
--- a/libs/vkd3d-shader/msl.c
+++ b/libs/vkd3d-shader/msl.c
@@ -387,6 +387,14 @@ static enum msl_data_type msl_print_register_name(struct vkd3d_string_buffer *bu
             msl_print_subscript(buffer, gen, reg->idx[1].rel_addr, reg->idx[1].offset);
             return MSL_DATA_UNION;
 
+        case VKD3DSPR_SAMPLEMASK:
+            if (gen->program->shader_version.type != VKD3D_SHADER_TYPE_PIXEL)
+                msl_compiler_error(gen, VKD3D_SHADER_ERROR_MSL_INTERNAL,
+                        "Internal compiler error: Unhandled sample coverage mask in shader type #%x.",
+                        gen->program->shader_version.type);
+            vkd3d_string_buffer_printf(buffer, "o_mask");
+            return MSL_DATA_FLOAT;
+
         default:
             msl_compiler_error(gen, VKD3D_SHADER_ERROR_MSL_INTERNAL,
                     "Internal compiler error: Unhandled register type %#x.", reg->type);
@@ -1292,6 +1300,12 @@ static void msl_generate_output_struct_declarations(struct msl_generator *gen)
         vkd3d_string_buffer_printf(buffer, "float shader_out_depth [[depth(any)]];\n");
     }
 
+    if (bitmap_is_set(gen->program->io_dcls, VKD3DSPR_SAMPLEMASK))
+    {
+        msl_print_indent(gen->buffer, 1);
+        vkd3d_string_buffer_printf(buffer, "uint shader_out_mask [[sample_mask]];\n");
+    }
+
     vkd3d_string_buffer_printf(buffer, "};\n\n");
 }
 
@@ -1387,6 +1401,9 @@ static void msl_generate_entrypoint_epilogue(struct msl_generator *gen)
         }
         vkd3d_string_buffer_printf(buffer, ";\n");
     }
+
+    if (bitmap_is_set(gen->program->io_dcls, VKD3DSPR_SAMPLEMASK))
+        vkd3d_string_buffer_printf(gen->buffer, "    output.shader_out_mask = as_type<uint>(o_mask);\n");
 }
 
 static void msl_generate_entrypoint(struct msl_generator *gen)
@@ -1430,6 +1447,9 @@ static void msl_generate_entrypoint(struct msl_generator *gen)
     vkd3d_string_buffer_printf(gen->buffer, "    vkd3d_vec4 %s_in[%u];\n", gen->prefix, 32);
     vkd3d_string_buffer_printf(gen->buffer, "    vkd3d_vec4 %s_out[%u];\n", gen->prefix, 32);
     vkd3d_string_buffer_printf(gen->buffer, "    vkd3d_%s_out output;\n", gen->prefix);
+    if (bitmap_is_set(gen->program->io_dcls, VKD3DSPR_SAMPLEMASK))
+        vkd3d_string_buffer_printf(gen->buffer, "    float o_mask;\n");
+    vkd3d_string_buffer_printf(gen->buffer, "\n");
 
     msl_generate_entrypoint_prologue(gen);
 
@@ -1438,9 +1458,11 @@ static void msl_generate_entrypoint(struct msl_generator *gen)
         vkd3d_string_buffer_printf(gen->buffer, ", vertex_id");
     if (bitmap_is_set(gen->program->io_dcls, VKD3DSPR_DEPTHOUT))
         vkd3d_string_buffer_printf(gen->buffer, ", output.shader_out_depth");
+    if (bitmap_is_set(gen->program->io_dcls, VKD3DSPR_SAMPLEMASK))
+        vkd3d_string_buffer_printf(gen->buffer, ", o_mask");
     if (gen->program->descriptors.descriptor_count)
         vkd3d_string_buffer_printf(gen->buffer, ", descriptors");
-    vkd3d_string_buffer_printf(gen->buffer, ");\n");
+    vkd3d_string_buffer_printf(gen->buffer, ");\n\n");
 
     msl_generate_entrypoint_epilogue(gen);
 
@@ -1502,6 +1524,8 @@ static int msl_generator_generate(struct msl_generator *gen, struct vkd3d_shader
         vkd3d_string_buffer_printf(gen->buffer, ", uint vertex_id");
     if (bitmap_is_set(gen->program->io_dcls, VKD3DSPR_DEPTHOUT))
         vkd3d_string_buffer_printf(gen->buffer, ", thread float &o_depth");
+    if (bitmap_is_set(gen->program->io_dcls, VKD3DSPR_SAMPLEMASK))
+        vkd3d_string_buffer_printf(gen->buffer, ", thread float &o_mask");
     if (gen->program->descriptors.descriptor_count)
         vkd3d_string_buffer_printf(gen->buffer, ", constant descriptor *descriptors");
     vkd3d_string_buffer_printf(gen->buffer, ")\n{\n");
diff --git a/tests/hlsl/coverage.shader_test b/tests/hlsl/coverage.shader_test
index bcaf3aa85..f09476c42 100644
--- a/tests/hlsl/coverage.shader_test
+++ b/tests/hlsl/coverage.shader_test
@@ -14,11 +14,11 @@ float4 main(out uint sample_mask : SV_Coverage) : SV_Target
 
 [test]
 clear rtv 0 0.0 0.0 0.0 0.0
-todo(glsl | msl) draw quad
+todo(glsl) draw quad
 probe (0, 0) rgba (0.5, 0.5, 0.5, 0.5)
 sample mask 0x0b
 clear rtv 0 0.0 0.0 0.0 0.0
-todo(glsl | msl) draw quad
+todo(glsl) draw quad
 probe (0, 0) rgba (0.25, 0.25, 0.25, 0.25)
 
 
diff --git a/tests/shader_runner_metal.m b/tests/shader_runner_metal.m
index d06111318..256099cac 100644
--- a/tests/shader_runner_metal.m
+++ b/tests/shader_runner_metal.m
@@ -24,8 +24,13 @@
 #define BOOL VKD3D_BOOLEAN
 #include "shader_runner.h"
 #include "vkd3d_d3dcommon.h"
+#undef interface
 #undef BOOL
 
+@interface MTLRenderPipelineDescriptor ()
+@property (nonatomic, readwrite) NSUInteger sampleMask;
+@end
+
 static const MTLResourceOptions DEFAULT_BUFFER_RESOURCE_OPTIONS = MTLResourceCPUCacheModeDefaultCache
         | MTLResourceHazardTrackingModeDefault;
 
@@ -687,6 +692,7 @@ static bool metal_runner_draw(struct shader_runner *r, D3D_PRIMITIVE_TOPOLOGY to
             }
         }
         pipeline_desc.rasterSampleCount = runner->r.sample_count;
+        pipeline_desc.sampleMask = runner->r.sample_mask;
         viewport.width = fb_width;
         viewport.height = fb_height;