diff --git a/electron-builder.json b/electron-builder.json
index 0ff93ab7..4028cd46 100644
--- a/electron-builder.json
+++ b/electron-builder.json
@@ -29,7 +29,13 @@
     {
       "from": "resources/prebuilt",
       "to": "prebuilt",
-      "filter": ["**/*", "!cache/**/*", "!**/.npm-cache/**/*"]
+      "filter": [
+        "**/*",
+        "!cache/**/*",
+        "!**/.npm-cache/**/*",
+        "!uv_python/**/*.pyc",
+        "!uv_python/**/__pycache__"
+      ]
     }
   ],
   "protocols": [
diff --git a/electron/main/init.ts b/electron/main/init.ts
index 1ee74eaa..2b0ace8c 100644
--- a/electron/main/init.ts
+++ b/electron/main/init.ts
@@ -1,4 +1,4 @@
-import { getBackendPath, getBinaryPath, getCachePath, getVenvPath, getUvEnv, isBinaryExists, runInstallScript, killProcessByName } from "./utils/process";
+import { getBackendPath, getBinaryPath, getCachePath, getVenvPath, getUvEnv, isBinaryExists, runInstallScript, killProcessByName, getPrebuiltPythonDir, getPrebuiltVenvPath } from "./utils/process";
 import { spawn, exec } from 'child_process'
 import log from 'electron-log'
 import fs from 'fs'
@@ -225,21 +225,34 @@ export async function startBackend(setPort?: (port: number) => void): Promise<an
                     log.warn(`Failed to remove lock file: ${e}`);
                 }
 
-                // Cleanup corrupted python cache
+                // Cleanup corrupted python cache ONLY if we don't have bundled Python
+                // If we have bundled Python, we want to keep it and reuse it
+                const prebuiltPythonDir = getPrebuiltPythonDir();
                 try {
                     const pythonCacheDir = getCachePath('uv_python');
-                    if (fs.existsSync(pythonCacheDir)) {
+                    // Only remove cache if we DON'T have prebuilt Python available
+                    // When prebuilt Python exists, UV will use it via UV_PYTHON_INSTALL_DIR
+                    if (fs.existsSync(pythonCacheDir) && !prebuiltPythonDir) {
                         log.info(`Removing potentially corrupted Python cache: ${pythonCacheDir}`);
                         fs.rmSync(pythonCacheDir, { recursive: true, force: true });
+                    } else if (prebuiltPythonDir) {
+                        log.info(`Preserving bundled Python at: ${prebuiltPythonDir}`);
                     }
                 } catch (e) {
                     log.warn(`Failed to remove Python cache: ${e}`);
                 }
 
                 // Cleanup corrupted venv (pyvenv.cfg may reference non-existent Python version)
+                // This is especially important for prebuilt venvs with hardcoded paths from CI
+                const prebuiltVenvPath = getPrebuiltVenvPath();
                 try {
+                    // If the broken venv is the prebuilt venv, we need to remove it
+                    // and let UV recreate it from the bundled Python
                     if (fs.existsSync(venvPath)) {
                         log.info(`Removing potentially corrupted venv: ${venvPath}`);
+                        if (venvPath === prebuiltVenvPath) {
+                            log.info(`This is the prebuilt venv with hardcoded paths - will recreate from bundled Python`);
+                        }
                         fs.rmSync(venvPath, { recursive: true, force: true });
                     }
                 } catch (e) {
diff --git a/electron/main/utils/process.ts b/electron/main/utils/process.ts
index c6d861e3..ec620a45 100644
--- a/electron/main/utils/process.ts
+++ b/electron/main/utils/process.ts
@@ -149,8 +149,21 @@ export function getPrebuiltVenvPath(): string | null {
   if (fs.existsSync(prebuiltVenvPath)) {
     const pyvenvCfg = path.join(prebuiltVenvPath, 'pyvenv.cfg');
     if (fs.existsSync(pyvenvCfg)) {
-      log.info(`Using prebuilt venv: ${prebuiltVenvPath}`);
-      return prebuiltVenvPath;
+      // Verify Python executable exists (Windows: Scripts/python.exe, Unix: bin/python)
+      const isWindows = process.platform === 'win32';
+      const pythonExePath = isWindows
+        ? path.join(prebuiltVenvPath, 'Scripts', 'python.exe')
+        : path.join(prebuiltVenvPath, 'bin', 'python');
+
+      if (fs.existsSync(pythonExePath)) {
+        log.info(`Using prebuilt venv: ${prebuiltVenvPath}`);
+        return prebuiltVenvPath;
+      } else {
+        log.warn(
+          `Prebuilt venv found but Python executable missing at: ${pythonExePath}. ` +
+            `Falling back to user venv.`
+        );
+      }
     }
   }
   return null;
@@ -272,6 +285,23 @@ export async function isBinaryExists(name: string): Promise<boolean> {
   return fs.existsSync(cmd);
 }
 
+/**
+ * Get path to prebuilt Python installation (if available in packaged app)
+ */
+export function getPrebuiltPythonDir(): string | null {
+  if (!app.isPackaged) {
+    return null;
+  }
+
+  const prebuiltPythonDir = path.join(process.resourcesPath, 'prebuilt', 'uv_python');
+  if (fs.existsSync(prebuiltPythonDir)) {
+    log.info(`Using prebuilt Python: ${prebuiltPythonDir}`);
+    return prebuiltPythonDir;
+  }
+
+  return null;
+}
+
 /**
  * Get unified UV environment variables for consistent Python environment management.
  * This ensures both installation and runtime use the same paths.
@@ -279,8 +309,12 @@ export async function isBinaryExists(name: string): Promise<boolean> {
  * @returns Environment variables for UV commands
  */
 export function getUvEnv(version: string): Record<string, string> {
+  // Use prebuilt Python if available (packaged app)
+  const prebuiltPython = getPrebuiltPythonDir();
+  const pythonInstallDir = prebuiltPython || getCachePath('uv_python');
+
   return {
-    UV_PYTHON_INSTALL_DIR: getCachePath('uv_python'),
+    UV_PYTHON_INSTALL_DIR: pythonInstallDir,
     UV_TOOL_DIR: getCachePath('uv_tool'),
     UV_PROJECT_ENVIRONMENT: getVenvPath(version),
     UV_HTTP_TIMEOUT: '300',
diff --git a/scripts/clean-symlinks.js b/scripts/clean-symlinks.js
index e011ba45..716a4c40 100644
--- a/scripts/clean-symlinks.js
+++ b/scripts/clean-symlinks.js
@@ -46,7 +46,7 @@ function isValidSymlink(symlinkPath, bundleRoot) {
 }
 
 /**
- * Fix Python symlinks in venv/bin
+ * Fix Python symlinks in venv/bin (Unix) or venv/Scripts (Windows)
  * Remove symlinks that point outside the bundle (to cache directory)
  */
 function fixPythonSymlinks(venvBinDir, bundleRoot) {
@@ -55,7 +55,10 @@ function fixPythonSymlinks(venvBinDir, bundleRoot) {
   }
 
   const bundlePath = path.resolve(bundleRoot);
-  const pythonNames = ['python', 'python3', 'python3.10', 'python3.11', 'python3.12'];
+  const isWindows = process.platform === 'win32';
+  const pythonNames = isWindows
+    ? ['python.exe', 'python3.exe', 'python3.10.exe', 'python3.11.exe', 'python3.12.exe']
+    : ['python', 'python3', 'python3.10', 'python3.11', 'python3.12'];
 
   for (const pythonName of pythonNames) {
     const pythonSymlink = path.join(venvBinDir, pythonName);
@@ -127,7 +130,8 @@ function main() {
   console.log('🧹 Cleaning invalid symbolic links...');
 
   const bundleRoot = path.join(projectRoot, 'resources', 'prebuilt');
-  const venvBinDir = path.join(bundleRoot, 'venv', 'bin');
+  const isWindows = process.platform === 'win32';
+  const venvBinDir = path.join(bundleRoot, 'venv', isWindows ? 'Scripts' : 'bin');
 
   // First, try to fix Python symlinks specifically
   if (fs.existsSync(venvBinDir)) {
diff --git a/scripts/preinstall-deps.js b/scripts/preinstall-deps.js
index a5ef3311..ad04989f 100644
--- a/scripts/preinstall-deps.js
+++ b/scripts/preinstall-deps.js
@@ -17,8 +17,9 @@ const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 const projectRoot = path.resolve(__dirname, '..');
 
-const BIN_DIR = path.join(projectRoot, 'resources', 'prebuilt', 'bin');
-const VENV_DIR = path.join(projectRoot, 'resources', 'prebuilt', 'venv');
+const PREBUILT_DIR = path.join(projectRoot, 'resources', 'prebuilt');
+const BIN_DIR = path.join(PREBUILT_DIR, 'bin');
+const VENV_DIR = path.join(PREBUILT_DIR, 'venv');
 const BACKEND_DIR = path.join(projectRoot, 'backend');
 
 console.log('🚀 Starting pre-installation of dependencies...');
@@ -197,6 +198,45 @@ async function downloadFileWithValidation(urlsToTry, dest, validateFn, fileType
   throw new Error(`Failed to download ${fileType} from all sources`);
 }
 
+/**
+ * Recursively copy directory, handling symlinks properly
+ */
+function copyDirRecursiveSync(src, dest) {
+  if (!fs.existsSync(src)) {
+    return;
+  }
+
+  // Create destination directory
+  fs.mkdirSync(dest, { recursive: true });
+
+  // Get all files and directories
+  const entries = fs.readdirSync(src, { withFileTypes: true });
+
+  for (const entry of entries) {
+    const srcPath = path.join(src, entry.name);
+    const destPath = path.join(dest, entry.name);
+
+    if (entry.isDirectory()) {
+      copyDirRecursiveSync(srcPath, destPath);
+    } else if (entry.isSymbolicLink()) {
+      try {
+        const realPath = fs.realpathSync(srcPath);
+        const realStat = fs.statSync(realPath);
+        if (realStat.isDirectory()) {
+          copyDirRecursiveSync(realPath, destPath);
+        } else {
+          fs.copyFileSync(realPath, destPath);
+        }
+      } catch (err) {
+        // If symlink target doesn't exist, skip it
+        console.log(`   Skipping broken symlink: ${srcPath}`);
+      }
+    } else {
+      fs.copyFileSync(srcPath, destPath);
+    }
+  }
+}
+
 /**
  * Get Bun download URL list
  */
@@ -613,11 +653,66 @@ async function installPythonDeps(uvPath) {
     console.log('📦 Creating Python venv...');
   }
 
+  // Ensure Python is installed before syncing
+  // This is critical for Windows where Python might not be in the venv
+  console.log('🐍 Ensuring Python is installed...');
+  try {
+    execSync(
+      `"${uvPath}" python install 3.10`,
+      { cwd: BACKEND_DIR, env: env, stdio: 'inherit' }
+    );
+  } catch (error) {
+    console.log('⚠️  Python install command failed, continuing with sync (Python may already be installed)...');
+  }
+
+  // Use --python-preference only-managed to ensure uv uses its own managed Python
+  // This makes the venv more portable
   execSync(
-    `"${uvPath}" sync --no-dev --cache-dir "${cacheDir}"`,
+    `"${uvPath}" sync --no-dev --cache-dir "${cacheDir}" --python-preference only-managed`,
     { cwd: BACKEND_DIR, env: env, stdio: 'inherit' }
   );
 
+  // Verify Python executable exists in the virtual environment
+  const isWindows = process.platform === 'win32';
+  const pythonExePath = isWindows
+    ? path.join(venvPath, 'Scripts', 'python.exe')
+    : path.join(venvPath, 'bin', 'python');
+
+  if (!fs.existsSync(pythonExePath)) {
+    throw new Error(
+      `Python executable not found in virtual environment at: ${pythonExePath}\n` +
+      `Virtual environment may be corrupted. Please ensure uv sync completed successfully.`
+    );
+  }
+
+  console.log(`✅ Python executable verified: ${pythonExePath}`);
+
+  // Bundle the actual Python installation from UV cache into prebuilt
+  console.log('📦 Bundling Python installation...');
+  try {
+    const uvPythonDir = pythonCacheDir;
+    const prebuiltPythonDir = path.join(PREBUILT_DIR, 'uv_python');
+
+    if (fs.existsSync(uvPythonDir)) {
+      console.log(`   Copying from: ${uvPythonDir}`);
+      console.log(`   Copying to: ${prebuiltPythonDir}`);
+
+      // Remove existing python dir if it exists
+      if (fs.existsSync(prebuiltPythonDir)) {
+        fs.rmSync(prebuiltPythonDir, { recursive: true, force: true });
+      }
+
+      // Copy the Python installation
+      copyDirRecursiveSync(uvPythonDir, prebuiltPythonDir);
+      console.log('✅ Python installation bundled');
+    } else {
+      console.log('⚠️  UV Python cache not found, venv may not be portable');
+    }
+  } catch (error) {
+    console.log(`⚠️  Failed to bundle Python: ${error.message}`);
+    console.log('   The app may fail to start without internet connection');
+  }
+
   console.log('✅ Python dependencies installed');
 
   console.log('📝 Compiling babel...');
diff --git a/scripts/test-notarization.js b/scripts/test-notarization.js
new file mode 100644
index 00000000..672b44a5
--- /dev/null
+++ b/scripts/test-notarization.js
@@ -0,0 +1,296 @@
+#!/usr/bin/env node
+/**
+ * Test script for macOS notarization issues
+ * This script checks for common issues that cause notarization to fail:
+ * 1. .npm-cache directories
+ * 2. flac-mac binary (outdated SDK)
+ * 3. Unsigned native binaries (.node files)
+ * 4. Other problematic files
+ */
+
+import fs from 'fs';
+import path from 'path';
+import { execSync } from 'child_process';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const projectRoot = path.resolve(__dirname, '..');
+
+const RELEASE_DIR = path.join(projectRoot, 'release');
+const APP_BUNDLE_PATTERN = /Eigent\.app$/;
+
+/**
+ * Find the app bundle in release directory
+ */
+function findAppBundle() {
+  if (!fs.existsSync(RELEASE_DIR)) {
+    console.log('❌ Release directory does not exist. Please build the app first.');
+    console.log('   Run: npm run build:mac');
+    return null;
+  }
+
+  const entries = fs.readdirSync(RELEASE_DIR, { withFileTypes: true });
+
+  for (const entry of entries) {
+    if (entry.isDirectory() && entry.name.match(APP_BUNDLE_PATTERN)) {
+      return path.join(RELEASE_DIR, entry.name);
+    }
+
+    // Check subdirectories (e.g., mac-arm64/Eigent.app)
+    if (entry.isDirectory()) {
+      const subDir = path.join(RELEASE_DIR, entry.name);
+      const subEntries = fs.readdirSync(subDir, { withFileTypes: true });
+      for (const subEntry of subEntries) {
+        if (subEntry.isDirectory() && subEntry.name.match(APP_BUNDLE_PATTERN)) {
+          return path.join(subDir, subEntry.name);
+        }
+      }
+    }
+  }
+
+  return null;
+}
+
+/**
+ * Check for .npm-cache directories
+ */
+function checkNpmCache(bundlePath) {
+  console.log('\n🔍 Checking for .npm-cache directories...');
+  const issues = [];
+
+  function scanDir(dir) {
+    if (!fs.existsSync(dir)) {
+      return;
+    }
+
+    try {
+      const entries = fs.readdirSync(dir, { withFileTypes: true });
+
+      for (const entry of entries) {
+        const fullPath = path.join(dir, entry.name);
+
+        if (entry.name === '.npm-cache' && entry.isDirectory()) {
+          issues.push(fullPath);
+        } else if (entry.isDirectory()) {
+          // Skip node_modules to avoid deep scanning
+          if (entry.name !== 'node_modules' && entry.name !== '__pycache__') {
+            scanDir(fullPath);
+          }
+        }
+      }
+    } catch (error) {
+      // Ignore errors
+    }
+  }
+
+  const resourcesPath = path.join(bundlePath, 'Contents', 'Resources');
+  const prebuiltPath = path.join(resourcesPath, 'prebuilt');
+
+  if (fs.existsSync(prebuiltPath)) {
+    scanDir(prebuiltPath);
+  }
+
+  if (issues.length > 0) {
+    console.log(`❌ Found ${issues.length} .npm-cache directory(ies):`);
+    issues.forEach(issue => console.log(`   - ${issue}`));
+    return false;
+  } else {
+    console.log('✅ No .npm-cache directories found');
+    return true;
+  }
+}
+
+/**
+ * Check for flac-mac binary
+ */
+function checkFlacMac(bundlePath) {
+  console.log('\n🔍 Checking for flac-mac binary...');
+  const issues = [];
+
+  const resourcesPath = path.join(bundlePath, 'Contents', 'Resources');
+  const prebuiltPath = path.join(resourcesPath, 'prebuilt');
+  const venvLibPath = path.join(prebuiltPath, 'venv', 'lib');
+
+  if (fs.existsSync(venvLibPath)) {
+    try {
+      const entries = fs.readdirSync(venvLibPath, { withFileTypes: true });
+      for (const entry of entries) {
+        if (entry.isDirectory() && entry.name.startsWith('python')) {
+          const flacMacPath = path.join(venvLibPath, entry.name, 'site-packages', 'speech_recognition', 'flac-mac');
+          if (fs.existsSync(flacMacPath)) {
+            issues.push(flacMacPath);
+          }
+        }
+      }
+    } catch (error) {
+      // Ignore errors
+    }
+  }
+
+  if (issues.length > 0) {
+    console.log(`❌ Found ${issues.length} flac-mac binary(ies) (outdated SDK):`);
+    issues.forEach(issue => console.log(`   - ${issue}`));
+    return false;
+  } else {
+    console.log('✅ No flac-mac binaries found');
+    return true;
+  }
+}
+
+/**
+ * Check for unsigned native binaries
+ */
+function checkUnsignedBinaries(bundlePath) {
+  console.log('\n🔍 Checking for unsigned native binaries (.node files)...');
+  const issues = [];
+
+  function scanForNodeFiles(dir) {
+    if (!fs.existsSync(dir)) {
+      return;
+    }
+
+    try {
+      const entries = fs.readdirSync(dir, { withFileTypes: true });
+
+      for (const entry of entries) {
+        const fullPath = path.join(dir, entry.name);
+
+        if (entry.isFile() && entry.name.endsWith('.node')) {
+          // Check if file is signed
+          try {
+            const output = execSync(`codesign -dv "${fullPath}" 2>&1 || true`, { encoding: 'utf-8' });
+            if (output.includes('code object is not signed')) {
+              issues.push({
+                path: fullPath,
+                reason: 'Not signed'
+              });
+            }
+          } catch (error) {
+            // If codesign fails, assume it's not signed
+            issues.push({
+              path: fullPath,
+              reason: 'Could not verify signature'
+            });
+          }
+        } else if (entry.isDirectory()) {
+          // Skip certain directories
+          if (entry.name !== 'node_modules' && entry.name !== '__pycache__' && !entry.name.startsWith('.')) {
+            scanForNodeFiles(fullPath);
+          }
+        }
+      }
+    } catch (error) {
+      // Ignore errors
+    }
+  }
+
+  const resourcesPath = path.join(bundlePath, 'Contents', 'Resources');
+  const prebuiltPath = path.join(resourcesPath, 'prebuilt');
+
+  if (fs.existsSync(prebuiltPath)) {
+    scanForNodeFiles(prebuiltPath);
+  }
+
+  if (issues.length > 0) {
+    console.log(`❌ Found ${issues.length} unsigned .node file(s):`);
+    issues.forEach(issue => {
+      console.log(`   - ${issue.path}`);
+      console.log(`     Reason: ${issue.reason}`);
+    });
+    return false;
+  } else {
+    console.log('✅ No unsigned .node files found');
+    return true;
+  }
+}
+
+/**
+ * Check app bundle size
+ */
+function checkBundleSize(bundlePath) {
+  console.log('\n🔍 Checking app bundle size...');
+
+  try {
+    function getDirSize(dir) {
+      let size = 0;
+      try {
+        const entries = fs.readdirSync(dir, { withFileTypes: true });
+        for (const entry of entries) {
+          const fullPath = path.join(dir, entry.name);
+          if (entry.isFile()) {
+            size += fs.statSync(fullPath).size;
+          } else if (entry.isDirectory()) {
+            size += getDirSize(fullPath);
+          }
+        }
+      } catch (error) {
+        // Ignore errors
+      }
+      return size;
+    }
+
+    const size = getDirSize(bundlePath);
+    const sizeInMB = (size / (1024 * 1024)).toFixed(2);
+    console.log(`   App bundle size: ${sizeInMB} MB`);
+
+    if (size > 500 * 1024 * 1024) {
+      console.log(`   ⚠️  Large bundle size (>500MB) may cause slow notarization (30-60 minutes)`);
+    } else if (size > 200 * 1024 * 1024) {
+      console.log(`   ⚠️  Medium bundle size (200-500MB) may take 15-30 minutes to notarize`);
+    } else {
+      console.log(`   ✅ Bundle size is reasonable for notarization`);
+    }
+
+    return true;
+  } catch (error) {
+    console.log(`   ⚠️  Could not calculate bundle size: ${error.message}`);
+    return true;
+  }
+}
+
+/**
+ * Main function
+ */
+function main() {
+  console.log('🧪 macOS Notarization Test Script\n');
+
+  const appBundle = findAppBundle();
+
+  if (!appBundle) {
+    console.log('\n💡 To build the app for testing:');
+    console.log('   npm run build:mac');
+    process.exit(1);
+  }
+
+  console.log(`📦 Found app bundle: ${appBundle}\n`);
+
+  const results = {
+    npmCache: checkNpmCache(appBundle),
+    flacMac: checkFlacMac(appBundle),
+    unsignedBinaries: checkUnsignedBinaries(appBundle),
+    bundleSize: checkBundleSize(appBundle),
+  };
+
+  console.log('\n📊 Summary:');
+  console.log(`   .npm-cache directories: ${results.npmCache ? '✅' : '❌'}`);
+  console.log(`   flac-mac binaries: ${results.flacMac ? '✅' : '❌'}`);
+  console.log(`   Unsigned .node files: ${results.unsignedBinaries ? '✅' : '❌'}`);
+  console.log(`   Bundle size: ${results.bundleSize ? '✅' : '⚠️'}`);
+
+  const allPassed = Object.values(results).every(r => r);
+
+  if (allPassed) {
+    console.log('\n✅ All checks passed! The app should be ready for notarization.');
+    console.log('\n💡 Note: This script only checks for common issues.');
+    console.log('   Actual notarization may still fail for other reasons.');
+    console.log('   To test actual notarization, you need:');
+    console.log('   - Valid Apple Developer ID certificate');
+    console.log('   - APPLE_ID, APPLE_APP_SPECIFIC_PASSWORD, APPLE_TEAM_ID environment variables');
+  } else {
+    console.log('\n❌ Some checks failed. Please fix the issues above before notarization.');
+    process.exit(1);
+  }
+}
+
+main();