diff --git a/electron-builder.yml b/electron-builder.yml
index 75e0a58..7cbb8db 100644
--- a/electron-builder.yml
+++ b/electron-builder.yml
@@ -49,7 +49,6 @@ mac:
   artifactName: "${productName}-${version}-${arch}.${ext}"
   target:
     - target: dmg
-      arch: [arm64, x64]
 win:
   icon: build/icon.ico
   target:
diff --git a/electron/updater.ts b/electron/updater.ts
index 53b9120..adf2e91 100644
--- a/electron/updater.ts
+++ b/electron/updater.ts
@@ -98,7 +98,14 @@ export function initAutoUpdater(win: BrowserWindow) {
   });
 
   ipcMain.handle('updater:download', async () => {
-    return autoUpdater.downloadUpdate();
+    try {
+      return await autoUpdater.downloadUpdate();
+    } catch (err) {
+      const message = err instanceof Error ? err.message : String(err);
+      console.error('[updater] Download failed:', message);
+      sendStatus({ status: 'error', error: message });
+      throw err;
+    }
   });
 
   ipcMain.handle('updater:quit-and-install', () => {
diff --git a/src/components/layout/AppShell.tsx b/src/components/layout/AppShell.tsx
index d30c864..221a8de 100644
--- a/src/components/layout/AppShell.tsx
+++ b/src/components/layout/AppShell.tsx
@@ -280,6 +280,8 @@ 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);
           console.warn('[updater] Error:', event.error);
           break;
       }
@@ -300,8 +302,16 @@ export function AppShell({ children }: { children: React.ReactNode }) {
     setShowDialog(false);
   }, []);
 
-  const downloadUpdate = useCallback(() => {
-    window.electronAPI?.updater?.downloadUpdate();
+  const downloadUpdate = useCallback(async () => {
+    // Immediately show downloading state so user gets feedback
+    setUpdateInfo((prev) => prev ? { ...prev, downloadProgress: 0 } : prev);
+    try {
+      await window.electronAPI?.updater?.downloadUpdate();
+    } catch (err) {
+      console.warn('[updater] Download failed:', err);
+      // Reset progress so the download button re-appears
+      setUpdateInfo((prev) => prev ? { ...prev, downloadProgress: null } : prev);
+    }
   }, []);
 
   const quitAndInstall = useCallback(() => {
diff --git a/src/components/layout/UpdateDialog.tsx b/src/components/layout/UpdateDialog.tsx
index 03f5703..b060578 100644
--- a/src/components/layout/UpdateDialog.tsx
+++ b/src/components/layout/UpdateDialog.tsx
@@ -20,7 +20,7 @@ export function UpdateDialog() {
   if (!updateInfo?.updateAvailable) return null;
 
   const { isNativeUpdate, readyToInstall, downloadProgress } = updateInfo;
-  const isDownloading = isNativeUpdate && !readyToInstall && downloadProgress != null && downloadProgress > 0;
+  const isDownloading = isNativeUpdate && !readyToInstall && downloadProgress != null;
 
   return (
     <Dialog open={showDialog} onOpenChange={(open) => {
diff --git a/src/components/settings/GeneralSection.tsx b/src/components/settings/GeneralSection.tsx
index de51573..c6c5c25 100644
--- a/src/components/settings/GeneralSection.tsx
+++ b/src/components/settings/GeneralSection.tsx
@@ -26,7 +26,7 @@ function UpdateCard() {
   const currentVersion = process.env.NEXT_PUBLIC_APP_VERSION || "0.0.0";
 
   const isDownloading = updateInfo?.isNativeUpdate && !updateInfo.readyToInstall
-    && updateInfo.downloadProgress != null && updateInfo.downloadProgress > 0;
+    && updateInfo.downloadProgress != null;
 
   return (
     <div className="rounded-lg border border-border/50 p-4 transition-shadow hover:shadow-sm">