feat: add macOS code signing and notarization support

- Add entitlements.mac.plist for hardened runtime
- Add notarize.js post-sign hook for Apple notarization
- Update package.json with signing config and @electron/notarize dep
- Update GitHub Actions workflow with signing secrets

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/release.yml

@@ -40,6 +40,14 @@ jobs:
       - run: npm ci
 
       - name: Build macOS Packages
+        env:
+          # Code signing
+          CSC_LINK: ${{ secrets.CSC_LINK }}
+          CSC_KEY_PASSWORD: ${{ secrets.CSC_KEY_PASSWORD }}
+          # Notarization
+          APPLE_ID: ${{ secrets.APPLE_ID }}
+          APPLE_APP_SPECIFIC_PASSWORD: ${{ secrets.APPLE_APP_SPECIFIC_PASSWORD }}
+          APPLE_TEAM_ID: ${{ secrets.APPLE_TEAM_ID }}
         run: npx electron-builder --mac --publish never
       - uses: actions/upload-artifact@v4
         with:

build/entitlements.mac.plist

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>com.apple.security.cs.allow-jit</key>
+    <true/>
+    <key>com.apple.security.cs.allow-unsigned-executable-memory</key>
+    <true/>
+    <key>com.apple.security.cs.disable-library-validation</key>
+    <true/>
+    <key>com.apple.security.network.client</key>
+    <true/>
+    <key>com.apple.security.network.server</key>
+    <true/>
+    <key>com.apple.security.files.user-selected.read-write</key>
+    <true/>
+</dict>
+</plist>

package.json

@@ -45,6 +45,7 @@
   },
   "license": "MIT",
   "devDependencies": {
+    "@electron/notarize": "^2.5.0",
     "electron": "^40.0.0",
     "electron-builder": "^26.4.0"
   },
@@ -131,8 +132,13 @@
         }
       ],
       "icon": "build/icon.icns",
-      "category": "public.app-category.games"
+      "category": "public.app-category.games",
+      "hardenedRuntime": true,
+      "gatekeeperAssess": false,
+      "entitlements": "build/entitlements.mac.plist",
+      "entitlementsInherit": "build/entitlements.mac.plist"
     },
+    "afterSign": "scripts/notarize.js",
     "nsis": {
       "oneClick": false,
       "allowToChangeInstallationDirectory": true,

scripts/notarize.js

@@ -0,0 +1,36 @@
+const { notarize } = require('@electron/notarize');
+const path = require('path');
+
+exports.default = async function notarizing(context) {
+  const { electronPlatformName, appOutDir } = context;
+
+  // Only notarize macOS builds
+  if (electronPlatformName !== 'darwin') {
+    console.log('Skipping notarization: not macOS');
+    return;
+  }
+
+  // Skip if credentials not provided (local builds)
+  if (!process.env.APPLE_ID || !process.env.APPLE_APP_SPECIFIC_PASSWORD || !process.env.APPLE_TEAM_ID) {
+    console.log('Skipping notarization: missing credentials (APPLE_ID, APPLE_APP_SPECIFIC_PASSWORD, or APPLE_TEAM_ID)');
+    return;
+  }
+
+  const appName = context.packager.appInfo.productFilename;
+  const appPath = path.join(appOutDir, `${appName}.app`);
+
+  console.log(`Notarizing ${appPath}...`);
+
+  try {
+    await notarize({
+      appPath,
+      appleId: process.env.APPLE_ID,
+      appleIdPassword: process.env.APPLE_APP_SPECIFIC_PASSWORD,
+      teamId: process.env.APPLE_TEAM_ID,
+    });
+    console.log('Notarization complete!');
+  } catch (error) {
+    console.error('Notarization failed:', error);
+    throw error;
+  }
+};