diff --git a/config/electron-builder.config.cjs b/config/electron-builder.config.cjs
index 50cfe7691e8..192615dea6f 100644
--- a/config/electron-builder.config.cjs
+++ b/config/electron-builder.config.cjs
@@ -225,6 +225,12 @@ module.exports = {
     include: resolve(__dirname, 'nsis', 'daemon-host-uninstall.nsh')
   },
   mac: {
+    // Why: macOS TCC keys permission grants to bundle id + code signature. A
+    // local build carrying the release appId under a different (ad-hoc/local)
+    // signature collides with the installed release's grant identity (#9756),
+    // so non-release packaging gets its own id. Gated on the same env that
+    // enables release signing/notarization, so release artifacts are untouched.
+    ...(isMacRelease ? {} : { appId: 'com.stablyai.orca.local' }),
     icon: 'resources/build/icon.icns',
     entitlements: 'resources/build/entitlements.mac.plist',
     entitlementsInherit: 'resources/build/entitlements.mac.plist',
diff --git a/native/computer-use-macos/Sources/OrcaComputerUseMacOS/main.swift b/native/computer-use-macos/Sources/OrcaComputerUseMacOS/main.swift
index da6c4d34cda..baa8b9ae296 100644
--- a/native/computer-use-macos/Sources/OrcaComputerUseMacOS/main.swift
+++ b/native/computer-use-macos/Sources/OrcaComputerUseMacOS/main.swift
@@ -3603,9 +3603,11 @@ private func isTrustedOrcaApplication(_ pid: pid_t) -> Bool {
     else {
         return false
     }
-    // Why: dev validation runs from per-worktree wrapper apps with stable
-    // Orca-owned bundle ids; the sidecar peer check must still authorize them.
+    // Why: dev validation runs from per-worktree wrapper apps and local
+    // packaging uses its own bundle id (#9756); the sidecar peer check must
+    // still authorize these Orca-owned identities.
     return bundleId == "com.stablyai.orca" ||
+        bundleId == "com.stablyai.orca.local" ||
         bundleId.hasPrefix("com.stablyai.orca.dev.") ||
         bundleId == "com.github.Electron"
 }
diff --git a/package.json b/package.json
index 02b58ce82ef..6bff416d0c2 100644
--- a/package.json
+++ b/package.json
@@ -74,7 +74,7 @@
     "build:unpack": "pnpm run build && pnpm run ensure:electron-runtime && electron-builder --config config/electron-builder.config.cjs --dir",
     "build:win": "pnpm run build:desktop && pnpm run ensure:electron-runtime && electron-builder --config config/electron-builder.config.cjs --win",
     "build:icons": "bash resources/icon-source/generate.sh",
-    "build:mac": "pnpm run build:desktop && pnpm run build:computer-macos && pnpm run build:notification-status-macos && pnpm run ensure:electron-runtime && electron-builder --config config/electron-builder.config.cjs --mac",
+    "build:mac": "pnpm run build:desktop && pnpm run build:computer-macos && pnpm run build:notification-status-macos --bundle-id com.stablyai.orca.local && pnpm run ensure:electron-runtime && electron-builder --config config/electron-builder.config.cjs --mac",
     "build:mac:release": "node config/scripts/verify-macos-release-env.mjs && ORCA_MAC_RELEASE=1 pnpm run build:desktop && ORCA_MAC_RELEASE=1 pnpm run build:computer-macos && ORCA_MAC_RELEASE=1 pnpm run build:notification-status-macos && pnpm run ensure:electron-runtime && ORCA_MAC_RELEASE=1 electron-builder --config config/electron-builder.config.cjs --mac",
     "build:linux": "pnpm run build:desktop && pnpm run ensure:electron-runtime && electron-builder --config config/electron-builder.config.cjs --linux AppImage deb",
     "test:e2e": "pnpm run ensure:electron-runtime && npx playwright test --config tests/playwright.config.ts --project=electron-headless",
diff --git a/src/main/ipc/notifications.test.ts b/src/main/ipc/notifications.test.ts
index d7930066ad7..a194e6e295f 100644
--- a/src/main/ipc/notifications.test.ts
+++ b/src/main/ipc/notifications.test.ts
@@ -238,6 +238,46 @@ describe('registerNotificationHandlers', () => {
     }
   })
 
+  it('falls back to the launchd bundle id for packaged local builds', async () => {
+    const originalPlatform = process.platform
+    const originalDevBundleId = process.env.ORCA_DEV_MACOS_BUNDLE_ID
+    const originalLaunchdBundleId = process.env.__CFBundleIdentifier
+    Object.defineProperty(process, 'platform', { value: 'darwin', configurable: true })
+    delete process.env.ORCA_DEV_MACOS_BUNDLE_ID
+    process.env.__CFBundleIdentifier = 'com.stablyai.orca.local'
+    try {
+      registerNotificationHandlers({
+        getSettings: () => ({
+          notifications: {
+            enabled: true,
+            agentTaskComplete: true,
+            terminalBell: true,
+            suppressWhenFocused: true
+          }
+        })
+      } as never)
+
+      const handler = getOpenSystemSettingsHandler()
+      handler({})
+
+      expect(shellOpenExternalMock).toHaveBeenCalledWith(
+        'x-apple.systempreferences:com.apple.Notifications-Settings.extension?id=com.stablyai.orca.local'
+      )
+    } finally {
+      Object.defineProperty(process, 'platform', { value: originalPlatform, configurable: true })
+      if (originalDevBundleId === undefined) {
+        delete process.env.ORCA_DEV_MACOS_BUNDLE_ID
+      } else {
+        process.env.ORCA_DEV_MACOS_BUNDLE_ID = originalDevBundleId
+      }
+      if (originalLaunchdBundleId === undefined) {
+        delete process.env.__CFBundleIdentifier
+      } else {
+        process.env.__CFBundleIdentifier = originalLaunchdBundleId
+      }
+    }
+  })
+
   it('opens Windows notification settings', async () => {
     const originalPlatform = process.platform
     Object.defineProperty(process, 'platform', { value: 'win32', configurable: true })
diff --git a/src/main/ipc/notifications.ts b/src/main/ipc/notifications.ts
index 95e9e3e3a47..bd308cea85b 100644
--- a/src/main/ipc/notifications.ts
+++ b/src/main/ipc/notifications.ts
@@ -187,7 +187,12 @@ function probeNotificationDelivery(): Promise<NotificationDeliveryProbeResult> {
 }
 
 function getMacNotificationSettingsUrl(): string {
-  const bundleId = process.env.ORCA_DEV_MACOS_BUNDLE_ID ?? MACOS_PACKAGED_BUNDLE_ID
+  // Why: local packaging uses com.stablyai.orca.local (#9756), so trust the
+  // launchd-provided id before falling back to the release id.
+  const bundleId =
+    process.env.ORCA_DEV_MACOS_BUNDLE_ID ??
+    process.env.__CFBundleIdentifier ??
+    MACOS_PACKAGED_BUNDLE_ID
   return `${MACOS_NOTIFICATION_SETTINGS_URL}?id=${encodeURIComponent(bundleId)}`
 }