diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb3116b..8f9c799 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.19.6] - 2026-03-05
+
+### Fixed
+
+- **Metal: MSAA resolve store action** — when a render pass has a resolve target
+  (MSAA → single-sample), Metal requires `MTLStoreActionMultisampleResolve` or
+  `MTLStoreActionStoreAndMultisampleResolve`. We were setting `MTLStoreActionStore`,
+  causing Metal to silently skip the resolve. The surface texture stayed
+  uninitialized (purple/magenta screen).
+  ([ui#23](https://github.com/gogpu/ui/issues/23))
+
 ## [0.19.5] - 2026-03-05
 
 ### Fixed
diff --git a/hal/metal/encoder.go b/hal/metal/encoder.go
index 34785db..75bd6b8 100644
--- a/hal/metal/encoder.go
+++ b/hal/metal/encoder.go
@@ -284,12 +284,21 @@ func (e *CommandEncoder) BeginRenderPass(desc *hal.RenderPassDescriptor) hal.Ren
 			clearColor := MTLClearColor{Red: ca.ClearValue.R, Green: ca.ClearValue.G, Blue: ca.ClearValue.B, Alpha: ca.ClearValue.A}
 			msgSendClearColor(attachment, Sel("setClearColor:"), clearColor)
 		}
-		_ = MsgSend(attachment, Sel("setStoreAction:"), uintptr(storeOpToMTL(ca.StoreOp)))
+		storeAction := storeOpToMTL(ca.StoreOp)
 		if ca.ResolveTarget != nil {
 			if rtv, ok := ca.ResolveTarget.(*TextureView); ok && rtv != nil {
 				_ = MsgSend(attachment, Sel("setResolveTexture:"), uintptr(rtv.raw))
+				// Metal requires MultisampleResolve store action when a resolve
+				// texture is set. Without this, Metal silently skips the MSAA
+				// resolve and the surface stays uninitialized (purple screen).
+				if storeAction == MTLStoreActionStore {
+					storeAction = MTLStoreActionStoreAndMultisampleResolve
+				} else {
+					storeAction = MTLStoreActionMultisampleResolve
+				}
 			}
 		}
+		_ = MsgSend(attachment, Sel("setStoreAction:"), uintptr(storeAction))
 	}
 	if desc.DepthStencilAttachment != nil {
 		dsa := desc.DepthStencilAttachment