diff --git a/.changeset/macos-key-events.md b/.changeset/macos-key-events.md
new file mode 100644
index 00000000000..15ee5d6237e
--- /dev/null
+++ b/.changeset/macos-key-events.md
@@ -0,0 +1,5 @@
+---
+'@fluentui-react-native/interactive-hooks': patch
+---
+
+On react-native-macos 0.78 and later, `useKeyProps`, `useKeyDownProps`, and `useKeyUpProps` emit `keyDownEvents` and `keyUpEvents`, the same as on win32, instead of the deprecated `validKeysDown` and `validKeysUp`. react-native-macos 0.73 and 0.74 still get the legacy props.
diff --git a/.changeset/macos-legacy-key-props.md b/.changeset/macos-legacy-key-props.md
new file mode 100644
index 00000000000..b2855b66503
--- /dev/null
+++ b/.changeset/macos-legacy-key-props.md
@@ -0,0 +1,5 @@
+---
+'@fluentui-react-native/adapters': patch
+---
+
+Mark the macOS view props `passthroughAllKeyEvents`, `validKeysDown`, and `validKeysUp` as deprecated. Only react-native-macos versions earlier than 0.78 support them.
diff --git a/packages/utils/adapters/src/platformProps.ts b/packages/utils/adapters/src/platformProps.ts
index 860c06058c3..dd53cf70360 100644
--- a/packages/utils/adapters/src/platformProps.ts
+++ b/packages/utils/adapters/src/platformProps.ts
@@ -252,10 +252,13 @@ export interface ViewAdditionsMacOS {
   onMouseEnter?: IMouseEventHandler;
   onMouseLeave?: IMouseEventHandler;
   onPreferredScrollerStyleDidChange?: (event: NativeSyntheticEvent<object>) => void;
+  /** @deprecated Only react-native-macos < 0.78 supports this prop. Use `keyDownEvents` and `keyUpEvents`. */
   passthroughAllKeyEvents?: boolean;
   tooltip?: string;
   // macOS `validKeysDown`/`validKeysUp` are arrays of key names (e.g. "Enter", " "), not key events.
+  /** @deprecated Only react-native-macos < 0.78 supports this prop. Use `keyDownEvents`. */
   validKeysDown?: string[];
+  /** @deprecated Only react-native-macos < 0.78 supports this prop. Use `keyUpEvents`. */
   validKeysUp?: string[];
 }
 
diff --git a/packages/utils/interactive-hooks/src/__tests__/useKeyProps.test.tsx b/packages/utils/interactive-hooks/src/__tests__/useKeyProps.test.tsx
index 4843a87414f..cb64f96345f 100644
--- a/packages/utils/interactive-hooks/src/__tests__/useKeyProps.test.tsx
+++ b/packages/utils/interactive-hooks/src/__tests__/useKeyProps.test.tsx
@@ -1,9 +1,10 @@
 import { act } from 'react';
-import { Pressable } from 'react-native';
+import { Platform, Pressable } from 'react-native';
 
 import * as renderer from 'react-test-renderer';
 
-import { useKeyProps } from '../useKeyProps';
+import { useKeyDownProps, useKeyProps, useKeyUpProps } from '../useKeyProps';
+import type { KeyPressEvent } from '../useKeyProps.types';
 import type { PressablePropsExtended } from '../usePressableState.types';
 
 const dummyFunction = () => {
@@ -42,3 +43,69 @@ it('useKeyProps called twice', () => {
   });
   expect(component!.toJSON()).toMatchSnapshot();
 });
+
+describe.each([
+  { direction: 'down', useKeyEventProps: useKeyDownProps, onKeyEvent: 'onKeyDown', keyEvents: 'keyDownEvents', validKeys: 'validKeysDown' },
+  { direction: 'up', useKeyEventProps: useKeyUpProps, onKeyEvent: 'onKeyUp', keyEvents: 'keyUpEvents', validKeys: 'validKeysUp' },
+] as const)('key $direction props', ({ useKeyEventProps, onKeyEvent, keyEvents, validKeys }) => {
+  afterEach(() => {
+    jest.restoreAllMocks();
+  });
+
+  // `memoize` caches the props for each set of arguments, so each call uses a new callback.
+  function getKeyEventProps(os: string, reactNativeMinorVersion: number) {
+    jest.replaceProperty(Platform, 'OS', os as typeof Platform.OS);
+    jest.spyOn(Platform, 'constants', 'get').mockReturnValue({
+      isTesting: true,
+      reactNativeVersion: { major: 0, minor: reactNativeMinorVersion, patch: 0 },
+    });
+    const callback = jest.fn();
+    return { callback, props: useKeyEventProps(callback, ' ', 'Enter') };
+  }
+
+  it.each([78, 81])(`uses ${keyEvents} on react-native-macos 0.%i`, (minor) => {
+    expect(getKeyEventProps('macos', minor).props).toStrictEqual({
+      [onKeyEvent]: expect.any(Function),
+      [keyEvents]: [{ key: ' ' }, { key: 'Enter' }],
+    });
+  });
+
+  it.each([73, 74])(`uses ${validKeys} on react-native-macos 0.%i`, (minor) => {
+    expect(getKeyEventProps('macos', minor).props).toStrictEqual({
+      [onKeyEvent]: expect.any(Function),
+      [validKeys]: [' ', 'Enter'],
+    });
+  });
+
+  it.each([74, 81])(`uses ${keyEvents} on win32 0.%i`, (minor) => {
+    expect(getKeyEventProps('win32', minor).props).toStrictEqual({
+      [onKeyEvent]: expect.any(Function),
+      [keyEvents]: [{ key: ' ' }, { key: 'Enter' }],
+    });
+  });
+
+  it(`uses only ${onKeyEvent} on react-native-windows`, () => {
+    expect(getKeyEventProps('windows', 81).props).toStrictEqual({ [onKeyEvent]: expect.any(Function) });
+  });
+
+  it.each(['ios', 'android'])('returns undefined on %s', (os) => {
+    expect(getKeyEventProps(os, 81).props).toBeUndefined();
+  });
+
+  it(`calls the callback from ${onKeyEvent} only for the listed keys`, () => {
+    const { callback, props } = getKeyEventProps('macos', 81);
+    const otherKey = { nativeEvent: { key: 'a' }, stopPropagation: jest.fn() };
+    const enter = { nativeEvent: { key: 'Enter' }, stopPropagation: jest.fn() };
+    props?.[onKeyEvent]?.(otherKey as unknown as KeyPressEvent);
+    props?.[onKeyEvent]?.(enter as unknown as KeyPressEvent);
+    expect(callback).toHaveBeenCalledTimes(1);
+    expect(callback).toHaveBeenCalledWith(enter);
+    expect(otherKey.stopPropagation).not.toHaveBeenCalled();
+    expect(enter.stopPropagation).toHaveBeenCalledTimes(1);
+  });
+
+  it('returns the same props for the same arguments', () => {
+    const { callback, props } = getKeyEventProps('macos', 81);
+    expect(useKeyEventProps(callback, ' ', 'Enter')).toBe(props);
+  });
+});
diff --git a/packages/utils/interactive-hooks/src/useKeyProps.ts b/packages/utils/interactive-hooks/src/useKeyProps.ts
index 6cba4a31f42..0bb290184a7 100644
--- a/packages/utils/interactive-hooks/src/useKeyProps.ts
+++ b/packages/utils/interactive-hooks/src/useKeyProps.ts
@@ -41,58 +41,55 @@ function keyPressCallback(userCallback?: KeyCallback, ...keys: string[]) {
   return onKeyEvent;
 }
 
-function getKeyUpPropsWorker(userCallback: KeyCallback, ...keys: string[]): KeyPressProps {
-  const keyboardProps = Platform.select({
-    ios: undefined,
-    android: undefined,
-    macos: {
-      onKeyUp: keyPressCallback(userCallback, ...keys),
-      validKeysUp: keys,
-    },
-    windows: {
-      /**
-       * https://github.com/microsoft/react-native-windows/issues/11049
-       * Windows doesn't filter on `key` but on `code`, which is quite different ('A' vs 'KeyA' or 'GamepadA').
-       * While this discrepancy is present, let's not specify `keyUpEvents`.
-       */
-      onKeyUp: keyPressCallback(userCallback, ...keys),
-    },
-    // win32
-    default: {
-      onKeyUp: keyPressCallback(userCallback, ...keys),
-      keyUpEvents: keys.map((keyCode) => {
-        return { key: keyCode };
-      }),
-    },
-  });
-  return keyboardProps;
+/**
+ * react-native-macos 0.78 removed native support for `validKeysDown` and `validKeysUp`. From that version,
+ * react-native-macos uses `keyDownEvents` and `keyUpEvents`, the same props as win32.
+ */
+function usesLegacyMacOSKeyProps(): boolean {
+  return Platform.OS === 'macos' && Platform.constants.reactNativeVersion.minor < 78;
 }
 
-function getKeyDownPropsWorker(userCallback: KeyCallback, ...keys: string[]): KeyPressProps {
-  const keyboardProps = Platform.select({
-    ios: undefined,
-    android: undefined,
-    macos: {
-      onKeyDown: keyPressCallback(userCallback, ...keys),
-      validKeysDown: keys,
-    },
-    windows: {
-      /**
-       * https://github.com/microsoft/react-native-windows/issues/11049
-       * Windows doesn't filter on `key` but on `code`, which is quite different ('A' vs 'KeyA' or 'GamepadA').
-       * While this discrepancy is present, let's not specify `keyDownEvents`.
-       */
-      onKeyDown: keyPressCallback(userCallback, ...keys),
-    },
-    // win32
-    default: {
-      onKeyDown: keyPressCallback(userCallback, ...keys),
-      keyDownEvents: keys.map((keyCode) => {
-        return { key: keyCode };
-      }),
-    },
-  });
-  return keyboardProps;
+type KeyEventDirection = 'down' | 'up';
+
+/**
+ * Gets the platform-specific props that call `userCallback` when one of `keys` goes down or up.
+ * The key down and key up hooks share this worker, so both directions use the same platform rules.
+ * Returns `undefined` on iOS and Android.
+ */
+function getKeyPropsWorker(direction: KeyEventDirection, userCallback: KeyCallback, keys: string[]): KeyPressProps | undefined {
+  if (Platform.OS === 'ios' || Platform.OS === 'android') {
+    return undefined;
+  }
+
+  const onKeyEvent = keyPressCallback(userCallback, ...keys);
+  const isKeyDown = direction === 'down';
+
+  if (Platform.OS === 'windows') {
+    /**
+     * https://github.com/microsoft/react-native-windows/issues/11049
+     * Windows doesn't filter on `key` but on `code`, which is quite different ('A' vs 'KeyA' or 'GamepadA').
+     * While this discrepancy is present, let's not specify `keyDownEvents` or `keyUpEvents`.
+     */
+    return isKeyDown ? { onKeyDown: onKeyEvent } : { onKeyUp: onKeyEvent };
+  }
+
+  if (usesLegacyMacOSKeyProps()) {
+    // react-native-macos 0.73 and 0.74 send JS only the key events that `validKeysDown` and `validKeysUp` list.
+    // Delete this branch when FURN drops support for react-native-macos < 0.78.
+    return isKeyDown ? { onKeyDown: onKeyEvent, validKeysDown: keys } : { onKeyUp: onKeyEvent, validKeysUp: keys };
+  }
+
+  // win32 and react-native-macos 0.78+
+  const keyEvents = keys.map((key) => ({ key }));
+  return isKeyDown ? { onKeyDown: onKeyEvent, keyDownEvents: keyEvents } : { onKeyUp: onKeyEvent, keyUpEvents: keyEvents };
+}
+
+function getKeyUpPropsWorker(userCallback: KeyCallback, ...keys: string[]): KeyPressProps | undefined {
+  return getKeyPropsWorker('up', userCallback, keys);
+}
+
+function getKeyDownPropsWorker(userCallback: KeyCallback, ...keys: string[]): KeyPressProps | undefined {
+  return getKeyPropsWorker('down', userCallback, keys);
 }
 
 /**
diff --git a/packages/utils/interactive-hooks/src/useKeyProps.types.ts b/packages/utils/interactive-hooks/src/useKeyProps.types.ts
index af309afeec7..fe6cc32af2b 100644
--- a/packages/utils/interactive-hooks/src/useKeyProps.types.ts
+++ b/packages/utils/interactive-hooks/src/useKeyProps.types.ts
@@ -3,9 +3,19 @@ export type { KeyEventHandler as KeyCallback, NativeKeyEvent as KeyPressEvent }
 
 export type KeyPressProps = {
   onKeyDown?: KeyEventHandler;
-  validKeysDown?: string[]; // macOS
-  keyDownEvents?: any[]; // windows
+  /**
+   * The keys that the view handles on key down. Only react-native-macos < 0.78 supports this prop.
+   * @deprecated Use `keyDownEvents`. react-native-macos 0.78 removed native support for `validKeysDown`.
+   */
+  validKeysDown?: string[];
+  /** The key events that the view handles on key down, for example `[{ key: 'Enter' }]`. Used on win32 and react-native-macos 0.78+. */
+  keyDownEvents?: any[];
   onKeyUp?: KeyEventHandler;
-  validKeysUp?: string[]; // macOS
-  keyUpEvents?: any[]; // windows
+  /**
+   * The keys that the view handles on key up. Only react-native-macos < 0.78 supports this prop.
+   * @deprecated Use `keyUpEvents`. react-native-macos 0.78 removed native support for `validKeysUp`.
+   */
+  validKeysUp?: string[];
+  /** The key events that the view handles on key up, for example `[{ key: 'Enter' }]`. Used on win32 and react-native-macos 0.78+. */
+  keyUpEvents?: any[];
 };
diff --git a/references/agents/focus/platform-evidence.md b/references/agents/focus/platform-evidence.md
index 7193dd18130..f1783b67bb1 100644
--- a/references/agents/focus/platform-evidence.md
+++ b/references/agents/focus/platform-evidence.md
@@ -31,10 +31,17 @@ the pinned dependency changes. Installed-package paths are relative to that pack
   MenuItem focuses on hover as an owner-specific exception. Sources:
   `packages/utils/interactive-hooks/src/useOnPressWithFocus.ts:14-29`; RNmacOS `RCTViewComponentView.mm:1769-1779`;
   `packages/components/Menu/src/MenuItem/useMenuItem.ts:68-120`. Version: RNmacOS 0.81.9. Observed: 2026-09-14.
-- **C-FOCUS-004:** V1 key helpers prefer key-down on macOS through `validKeysDown` and `validKeysUp`, while RNmacOS
-  native handling also exposes `keyDownEvents` and `keyUpEvents`. RNmacOS Pressability activates Return and Space on
-  key-down, and key-up supplies `onPressOut`. Sources: `packages/utils/interactive-hooks/src/useKeyProps.ts:8-95,114-126`;
-  RNmacOS `RCTViewComponentView.mm:1807-1861`. Version: RNmacOS 0.81.9. Observed: 2026-09-14.
+- **C-FOCUS-004:** V1 key helpers prefer key-down on macOS. On RNmacOS 0.78 and later they declare handled keys through
+  `keyDownEvents` and `keyUpEvents`, the same path as Win32; only RNmacOS 0.73 and 0.74 still get the legacy
+  `validKeysDown` and `validKeysUp`. The installed native View emits every key event to JS and blocks `super` handling
+  only for a matching `keyDownEvents` or `keyUpEvents` entry. In the Fabric matcher, a modifier that the entry omits
+  matches any value, so `{ key: 'Enter' }` also matches Shift+Enter natively; Paper and the JS View matcher treat an
+  omitted modifier as false. RNmacOS Pressability activates Return and Space on key-down, and key-up supplies
+  `onPressOut`. Sources: `packages/utils/interactive-hooks/src/useKeyProps.ts:8-93,111-123`; RNmacOS
+  `RCTViewComponentView.mm:1807-1861`;
+  `ReactCommon/react/renderer/components/view/platform/macos/react/renderer/components/view/KeyEvent.h:105-111`;
+  `React/Views/RCTHandledKey.m:104-130`; `Libraries/Components/View/View.js:48-92`;
+  `Libraries/Pressability/Pressability.js:596-634`. Version: RNmacOS 0.81.9. Observed: 2026-10-15.
 - **C-FOCUS-005:** The macOS FocusZone translates key events, recalculates the key-view loop, and falls back to
   mounted descendant order when AppKit collapses a Fabric-backed zone to one key-loop entry. Its Fabric wrapper does
   not become another first-responder stop; it forwards focus to its content view. Sources: