diff --git a/.github/workflows/build-and-release.yml b/.github/workflows/build-and-release.yml
index 14df8dc5..eaeec737 100644
--- a/.github/workflows/build-and-release.yml
+++ b/.github/workflows/build-and-release.yml
@@ -20,7 +20,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, macos-13, windows-latest]
+        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-latest]
 
     steps:
       - name: Check out Git repository
@@ -62,11 +62,11 @@ jobs:
           SHARP_IGNORE_GLOBAL_LIBVIPS: 1
 
       - name: Install Castlabs EVS
-        if: matrix.os == 'macos-latest' || matrix.os == 'macos-13' || matrix.os == 'windows-latest'
+        if: matrix.os == 'macos-latest' || matrix.os == 'windows-latest'
         run: python3 -m pip install --upgrade castlabs-evs --break-system-packages
 
       - name: Login to Castlabs EVS (macOS)
-        if: matrix.os == 'macos-latest' || matrix.os == 'macos-13'
+        if: matrix.os == 'macos-latest'
         continue-on-error: true
         run: python3 -m castlabs_evs.account --no-ask reauth -A $ACCOUNT_NAME -P $PASSWD
         env:
@@ -90,7 +90,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build for macOS
-        if: matrix.os == 'macos-latest' || matrix.os == 'macos-13'
+        if: matrix.os == 'macos-latest'
         run: bun run build:mac -p always
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7518e174..ebc74cb0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -39,7 +39,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, macos-13, windows-latest]
+        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-latest]
 
     steps:
       - name: Check out Git repository
@@ -87,7 +87,7 @@ jobs:
           USE_SYSTEM_FPM: ${{ matrix.os == 'ubuntu-24.04-arm' }}
 
       - name: Build for macOS
-        if: matrix.os == 'macos-latest' || matrix.os == 'macos-13'
+        if: matrix.os == 'macos-latest'
         run: bun run build:mac -p never
 
       - name: Build for Windows
@@ -126,7 +126,6 @@ jobs:
             - [Linux](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}/ubuntu-latest.zip)
             - [Linux (arm64)](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}/ubuntu-24.04-arm.zip)
             - [macOS](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}/macos-latest.zip)
-            - [macOS (Intel)](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}/macos-13.zip)
             - [Windows](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}/windows-latest.zip)
 
             _(execution **${{ github.run_id }}** / attempt **${{ github.run_attempt }}**)_
diff --git a/build/hooks/afterExtract.js b/build/hooks/afterExtract.js
new file mode 100644
index 00000000..cac722a9
--- /dev/null
+++ b/build/hooks/afterExtract.js
@@ -0,0 +1,23 @@
+import { removeWidevineSignature } from "./components/castlabs-evs.js";
+
+// Set this to true if you're building for universal
+const MACOS_IS_UNIVERSAL = true;
+
+/** @type {(context: import("./types.js").PackContext) => void} */
+export async function handler(context) {
+  // Header
+  console.log("\n---------");
+  console.log("Executing afterExtract hook");
+
+  // Remove `.sig` file which is causing universal builds to fail
+  if (process.platform === "darwin" && MACOS_IS_UNIVERSAL) {
+    await removeWidevineSignature(context.appOutDir)
+      .then(() => true)
+      .catch(() => false);
+  }
+
+  // Footer
+  console.log("---------\n");
+}
+
+export default handler;
diff --git a/build/hooks/afterPack.js b/build/hooks/afterPack.js
index c81537ef..8ffcd6ae 100644
--- a/build/hooks/afterPack.js
+++ b/build/hooks/afterPack.js
@@ -3,6 +3,9 @@ import { createNotarizationApiKeyFile } from "./components/notarization.js";
 
 const vmpSignPlatforms = ["darwin"];
 
+// Set this to true if you're building for universal
+const MACOS_IS_UNIVERSAL = true;
+
 /** @type {(context: import("./types.js").PackContext) => void} */
 export async function handler(context) {
   // Header
@@ -11,9 +14,20 @@ export async function handler(context) {
 
   // macOS needs to VMP-sign the app before signing it with Apple
   if (vmpSignPlatforms.includes(process.platform)) {
-    await signAppWithVMP(context.appOutDir)
-      .then(() => true)
-      .catch(() => false);
+    let shouldSign = true;
+    if (process.platform === "darwin" && MACOS_IS_UNIVERSAL) {
+      const appOutDir = context.appOutDir;
+      // Only sign the universal build, not the unmerged builds
+      if (!appOutDir.endsWith("/mac-universal")) {
+        shouldSign = false;
+      }
+    }
+
+    if (shouldSign) {
+      await signAppWithVMP(context.appOutDir)
+        .then(() => true)
+        .catch(() => false);
+    }
   }
 
   // macOS needs to notarize the app with a path to APPLE_API_KEY
diff --git a/build/hooks/components/castlabs-evs.js b/build/hooks/components/castlabs-evs.js
index ad1ef8be..6d220a38 100644
--- a/build/hooks/components/castlabs-evs.js
+++ b/build/hooks/components/castlabs-evs.js
@@ -2,6 +2,8 @@
 // https://github.com/castlabs/electron-releases/wiki/EVS
 
 import process from "process";
+import path from "node:path";
+import fs from "node:fs";
 import { spawn } from "child_process";
 
 /** @type {(appOutDir: string) => Promise<void>} */
@@ -54,4 +56,21 @@ async function signAppWithVMP(appOutDir) {
   }
 }
 
-export { signAppWithVMP };
+/** @type {(appOutDir: string) => Promise<void>} */
+async function removeWidevineSignature(appOutDir) {
+  const sigFile = path.join(
+    appOutDir,
+    "Electron.app",
+    "Contents/Frameworks/Electron Framework.framework/Versions/A/Resources",
+    "Electron Framework.sig"
+  );
+  if (fs.existsSync(sigFile)) {
+    console.log(`\nRemoving Development Widevine Signature`);
+    console.log(`${sigFile}`);
+    fs.unlinkSync(sigFile);
+  } else {
+    console.log(`\nNo Development Widevine Signature found`);
+  }
+}
+
+export { signAppWithVMP, removeWidevineSignature };
diff --git a/electron-builder.json b/electron-builder.json
index f6bc106c..98760df5 100644
--- a/electron-builder.json
+++ b/electron-builder.json
@@ -97,7 +97,10 @@
     "owner": "multiboxlabs",
     "releaseType": "prerelease"
   },
-  "electronDist": "node_modules/electron/dist",
+  "electronDownload": {
+    "mirror": "https://github.com/castlabs/electron-releases/releases/download/v"
+  },
   "afterPack": "./build/hooks/afterPack.js",
-  "afterSign": "./build/hooks/afterSign.js"
+  "afterSign": "./build/hooks/afterSign.js",
+  "afterExtract": "./build/hooks/afterExtract.js"
 }
diff --git a/package.json b/package.json
index 2124f134..d49bb0ec 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "postinstall": "electron-builder install-app-deps",
     "build:unpack": "npm run build && electron-builder --dir",
     "build:win": "npm run build && electron-builder --win",
-    "build:mac": "electron-vite build && electron-builder --mac",
+    "build:mac": "electron-vite build && electron-builder --mac --universal",
     "build:linux": "electron-vite build && electron-builder --linux",
     "script:use-stock-electron": "bun run scripts/use-stock-electron.ts",
     "script:upgrade-electron-to-current": "bun run scripts/electron-upgrader/current.ts",
diff --git a/scripts/use-stock-electron.ts b/scripts/use-stock-electron.ts
index d5bdfcf1..8ca92192 100644
--- a/scripts/use-stock-electron.ts
+++ b/scripts/use-stock-electron.ts
@@ -118,6 +118,39 @@ function updateBunLock(electronVersion: string) {
   fs.writeFileSync(bunLockPath, updatedContent);
 }
 
+/**
+ * Updates the electron-builder.json file to remove electronDownload and add electronDist
+ */
+function updateElectronBuilderJson() {
+  const electronBuilderPath = path.join(process.cwd(), "electron-builder.json");
+
+  // Check if file exists
+  if (!fs.existsSync(electronBuilderPath)) {
+    console.log("⚠️  electron-builder.json not found, skipping...");
+    return;
+  }
+
+  // Read and parse electron-builder.json
+  const electronBuilderContent = fs.readFileSync(electronBuilderPath, "utf8");
+  const electronBuilder = jju.parse(electronBuilderContent);
+
+  // Remove electronDownload key if it exists
+  if (electronBuilder.electronDownload) {
+    delete electronBuilder.electronDownload;
+  }
+
+  // Add electronDist key
+  electronBuilder.electronDist = "node_modules/electron/dist";
+
+  // Write back to electron-builder.json with preserved formatting
+  const updatedContent = jju.update(electronBuilderContent, electronBuilder, {
+    mode: "json",
+    indent: 2
+  });
+
+  fs.writeFileSync(electronBuilderPath, updatedContent);
+}
+
 /**
  * Parse command line arguments
  */
@@ -162,6 +195,11 @@ async function main() {
     updateBunLock(electronVersion);
     console.log("✅ bun.lock updated!");
 
+    // Update electron-builder.json
+    console.log("⚙️  Updating electron-builder.json...");
+    updateElectronBuilderJson();
+    console.log("✅ electron-builder.json updated!");
+
     console.log(`🎉 Successfully updated Electron to standard npm version ${electronVersion}`);
     console.log("💡 Note: This switches from castlabs/electron-releases to standard electron");
     console.log("🔄 Run 'bun install' to apply the changes");