diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d70b51e..ec5e556 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -46,9 +46,6 @@ jobs:
   build-macos:
     if: ${{ github.event_name == 'push' || inputs.platform == 'all' || inputs.platform == 'macos' }}
     runs-on: macos-latest
-    strategy:
-      matrix:
-        arch: [x64, arm64]
     steps:
       - uses: actions/checkout@v4
 
@@ -63,10 +60,10 @@ jobs:
       - name: Build Electron app
         run: npm run electron:build
 
-      - name: Package for macOS (${{ matrix.arch }})
+      - name: Package for macOS (x64 + arm64)
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: npx electron-builder --mac --${{ matrix.arch }} --config electron-builder.yml --publish always
+        run: npx electron-builder --mac --config electron-builder.yml --publish always
 
   build-linux:
     if: ${{ github.event_name == 'push' || inputs.platform == 'all' || inputs.platform == 'linux' }}
diff --git a/electron-builder.yml b/electron-builder.yml
index 7cbb8db..ea92e17 100644
--- a/electron-builder.yml
+++ b/electron-builder.yml
@@ -49,6 +49,9 @@ mac:
   artifactName: "${productName}-${version}-${arch}.${ext}"
   target:
     - target: dmg
+      arch: [x64, arm64]
+    - target: zip
+      arch: [x64, arm64]
 win:
   icon: build/icon.ico
   target:
diff --git a/src/components/layout/AppShell.tsx b/src/components/layout/AppShell.tsx
index 8f42ce6..9bda39b 100644
--- a/src/components/layout/AppShell.tsx
+++ b/src/components/layout/AppShell.tsx
@@ -225,6 +225,7 @@ export function AppShell({ children }: { children: React.ReactNode }) {
         downloadProgress: null,
         readyToInstall: false,
         isNativeUpdate: false,
+        lastError: null,
       };
       setUpdateInfo(info);
 
@@ -244,6 +245,7 @@ export function AppShell({ children }: { children: React.ReactNode }) {
   // --- Electron native updater check ---
   const checkForUpdatesNative = useCallback(async () => {
     setChecking(true);
+    setUpdateInfo((prev) => prev ? { ...prev, lastError: null } : prev);
     try {
       await window.electronAPI?.updater?.checkForUpdates();
     } catch {
@@ -280,6 +282,7 @@ export function AppShell({ children }: { children: React.ReactNode }) {
               downloadProgress: prev?.downloadProgress ?? null,
               readyToInstall: prev?.readyToInstall ?? false,
               isNativeUpdate: true,
+              lastError: null,
             };
             return newInfo;
           });
@@ -300,6 +303,7 @@ export function AppShell({ children }: { children: React.ReactNode }) {
           setUpdateInfo((prev) => prev ? {
             ...prev,
             downloadProgress: event.progress?.percent ?? null,
+            lastError: null,
           } : prev);
           break;
 
@@ -310,6 +314,7 @@ export function AppShell({ children }: { children: React.ReactNode }) {
               ...prev,
               readyToInstall: true,
               downloadProgress: 100,
+              lastError: null,
             };
           });
           break;
@@ -317,7 +322,11 @@ export function AppShell({ children }: { children: React.ReactNode }) {
         case 'error':
           setChecking(false);
           // Reset download progress so the download button re-appears
-          setUpdateInfo((prev) => prev ? { ...prev, downloadProgress: null } : prev);
+          setUpdateInfo((prev) => prev ? {
+            ...prev,
+            downloadProgress: null,
+            lastError: event.error ?? 'Update failed',
+          } : prev);
           console.warn('[updater] Error:', event.error);
           break;
       }
@@ -340,13 +349,18 @@ export function AppShell({ children }: { children: React.ReactNode }) {
 
   const downloadUpdate = useCallback(async () => {
     // Immediately show downloading state so user gets feedback
-    setUpdateInfo((prev) => prev ? { ...prev, downloadProgress: 0 } : prev);
+    setUpdateInfo((prev) => prev ? { ...prev, downloadProgress: 0, lastError: null } : prev);
     try {
       await window.electronAPI?.updater?.downloadUpdate();
     } catch (err) {
       console.warn('[updater] Download failed:', err);
+      const message = err instanceof Error ? err.message : String(err);
       // Reset progress so the download button re-appears
-      setUpdateInfo((prev) => prev ? { ...prev, downloadProgress: null } : prev);
+      setUpdateInfo((prev) => prev ? {
+        ...prev,
+        downloadProgress: null,
+        lastError: message,
+      } : prev);
     }
   }, []);
 
diff --git a/src/components/layout/UpdateDialog.tsx b/src/components/layout/UpdateDialog.tsx
index b060578..05cd703 100644
--- a/src/components/layout/UpdateDialog.tsx
+++ b/src/components/layout/UpdateDialog.tsx
@@ -84,6 +84,12 @@ export function UpdateDialog() {
           </div>
         )}
 
+        {updateInfo.lastError && (
+          <p className="rounded-md border border-red-500/20 bg-red-500/10 px-2 py-1 text-xs text-red-600 dark:text-red-400">
+            {updateInfo.lastError}
+          </p>
+        )}
+
         <DialogFooter>
           <Button variant="outline" onClick={dismissUpdate}>
             {t('update.later')}
diff --git a/src/components/settings/GeneralSection.tsx b/src/components/settings/GeneralSection.tsx
index c6c5c25..41a2d61 100644
--- a/src/components/settings/GeneralSection.tsx
+++ b/src/components/settings/GeneralSection.tsx
@@ -102,6 +102,11 @@ function UpdateCard() {
                   />
                 </div>
               )}
+              {updateInfo.lastError && (
+                <p className="text-xs text-red-600 dark:text-red-400">
+                  {updateInfo.lastError}
+                </p>
+              )}
             </div>
           ) : (
             <p className="text-sm text-muted-foreground">{t('settings.latestVersion')}</p>
diff --git a/src/hooks/useUpdate.ts b/src/hooks/useUpdate.ts
index cce2841..da1ed3e 100644
--- a/src/hooks/useUpdate.ts
+++ b/src/hooks/useUpdate.ts
@@ -13,6 +13,7 @@ export interface UpdateInfo {
   downloadProgress: number | null;
   readyToInstall: boolean;
   isNativeUpdate: boolean;
+  lastError: string | null;
 }
 
 export interface UpdateContextValue {