diff --git a/after_sign_hook.js b/after_sign_hook.js
index fe28c9f25..24642db10 100644
--- a/after_sign_hook.js
+++ b/after_sign_hook.js
@@ -3,14 +3,11 @@ const path = require('path');
 var electron_notarize = require('electron-notarize');
 
 module.exports = async function(params) {
-	// Only notarize the app on Mac OS only.
-	for (var key of params.platformToTargets.keys()) {
-		if (key.name !== 'mac') {
-			return;
-		}
-	}
-
-  console.log('afterSign hook triggered');
+  // Only notarize the app on Mac OS only.
+  if (params.electronPlatformName !== 'darwin') {
+    return;
+  }
+  console.log('afterSign hook triggered', params);
 
   if (!process.env.CIRCLE_TAG || process.env.CIRCLE_TAG.length === 0) {
     console.log('Not on a tag. Skipping notarization');
@@ -20,16 +17,18 @@ module.exports = async function(params) {
   // Same appId in electron-builder.
   let appId = 'com.automattic.wordpress';
 
-  let appPath = path.join(
-		params.outDir,
-		`mac/WordPress.com.app`
-	)
+  let appPath = params.appOutDir
+    ? path.join(
+        params.appOutDir,
+        `${params.packager.appInfo.productFilename}.app`
+      )
+    : params.artifactPaths[0].replace(new RegExp('.blockmap'), '');
 
-	if (!fs.existsSync(appPath)) {
+  if (!fs.existsSync(appPath)) {
     throw new Error(`Cannot find application at: ${appPath}`);
   }
 
-	console.log(`Notarizing ${appId} found at ${appPath}`);
+  console.log(`Notarizing ${appId} found at ${appPath}`);
 
   try {
     await electron_notarize.notarize({
@@ -43,5 +42,5 @@ module.exports = async function(params) {
     console.error(error);
   }
 
-  console.log(`Done notarizing ${appPath}`);
+  console.log(`Done notarizing ${appId}`);
 };
diff --git a/package.json b/package.json
index 196ebe4e0..ef49cebf1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "WordPressDesktop",
-  "version": "4.7.0",
+  "version": "5.0.0",
   "repository": {
     "type": "git",
     "url": "https://github.com/Automattic/wp-desktop/"
@@ -93,6 +93,7 @@
     "appId": "com.automattic.wordpress",
     "asar": false,
     "directories": {
+      "buildResources": "./resource/icons",
       "output": "./release"
     },
     "files": [
@@ -110,7 +111,6 @@
       }
     ],
     "mac": {
-      "icon": "./resource/image/mac/app-icon.icns",
       "category": "public.app-category.social-networking",
       "entitlements": "./resource/macos/entitlements.mac.plist",
       "entitlementsInherit": "./resource/macos/entitlements.mac.inherit.plist",
@@ -121,9 +121,7 @@
     },
     "dmg": {
       "title": "WordPress.com Installer",
-      "icon": "./resource/image/mac/dmg-icon.icns",
       "iconSize": 150,
-      "background": "./resource/image/mac/dmg-background/background.png",
       "contents": [
         {
           "x": 486,
@@ -146,7 +144,6 @@
           "ia32"
         ]
       },
-      "icon": "./resource/image/win/wordpress.ico",
       "certificateSubjectName": "Automattic, Inc."
     },
     "nsis": {
@@ -157,7 +154,6 @@
         "deb",
         "tar.gz"
       ],
-      "icon": "./resource/image/linux/512x512.png",
       "executableName": "wpcom",
       "description": "WordPress.com Desktop Client",
       "synopsis": "WordPress.com Desktop client",
@@ -178,6 +174,7 @@
         "libnss3"
       ]
     },
+    "afterSign": "./after_sign_hook.js",
     "afterAllArtifactBuild": "./after_sign_hook.js"
   }
 }
diff --git a/resource/image/mac/dmg-background/background.png b/resource/icons/background.png
similarity index 100%
rename from resource/image/mac/dmg-background/background.png
rename to resource/icons/background.png
diff --git a/resource/image/mac/dmg-background/background@2x.png b/resource/icons/background@2x.png
similarity index 100%
rename from resource/image/mac/dmg-background/background@2x.png
rename to resource/icons/background@2x.png
diff --git a/resource/image/mac/app-icon.icns b/resource/icons/icon.icns
similarity index 100%
rename from resource/image/mac/app-icon.icns
rename to resource/icons/icon.icns
diff --git a/resource/image/win/wordpress.ico b/resource/icons/icon.ico
similarity index 100%
rename from resource/image/win/wordpress.ico
rename to resource/icons/icon.ico
diff --git a/resource/image/linux/icon_128x128.png b/resource/image/linux/icon_128x128.png
deleted file mode 100644
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diff --git a/resource/image/linux/icon_256x256.png b/resource/image/linux/icon_256x256.png
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diff --git a/resource/image/linux/icon_32x32.png b/resource/image/linux/icon_32x32.png
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diff --git a/resource/image/linux/icon_512x512.png b/resource/image/linux/icon_512x512.png
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diff --git a/resource/image/mac/dmg-icon.icns b/resource/image/mac/dmg-icon.icns
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