diff --git a/Makefile b/Makefile
index 1ac985b..3716705 100644
--- a/Makefile
+++ b/Makefile
@@ -172,41 +172,51 @@ desktop-build-mac: desktop-prepare-frontend desktop-prepare-embedfs
 	@echo "🍎 Building macOS..."
 	cd backend && CGO_ENABLED=1 GOOS=darwin GOARCH=arm64 go build -o ../build/nex-mac-arm64 ./cmd/desktop
 	cd backend && CGO_ENABLED=1 GOOS=darwin GOARCH=amd64 go build -o ../build/nex-mac-amd64 ./cmd/desktop
+	lipo -create build/nex-mac-arm64 build/nex-mac-amd64 -output build/nex-mac-universal
 	@echo "📦 Packaging macOS .app..."
 	mkdir -p build/Nex.app/Contents/MacOS build/Nex.app/Contents/Resources
-	cp build/nex-mac-arm64 build/Nex.app/Contents/MacOS/nex
+	cp build/nex-mac-universal build/Nex.app/Contents/MacOS/nex
 	@if [ -f assets/AppIcon.icns ]; then \
 		cp assets/AppIcon.icns build/Nex.app/Contents/Resources/; \
 	else \
 		echo "⚠️  未找到 assets/AppIcon.icns"; \
 	fi
-	@{ \
+	@MIN_MACOS_VERSION=$$(vtool -show-build build/nex-mac-universal | awk '/minos / {print $$2; exit}'); \
+	if [ -z "$$MIN_MACOS_VERSION" ]; then \
+		echo "❌ 无法读取 macOS 最低系统版本"; \
+		exit 1; \
+	fi; \
+	{ \
 		printf '%s\n' '<?xml version="1.0" encoding="UTF-8"?>' \
 			'<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">' \
 			'<plist version="1.0">' \
 			'<dict>' \
 			'    <key>CFBundleDevelopmentRegion</key>' \
-			'    <string>zh_CN</string>' \
+			'    <string>zh-Hans</string>' \
 			'    <key>CFBundleExecutable</key>' \
 			'    <string>nex</string>' \
 			'    <key>CFBundleIconFile</key>' \
 			'    <string>AppIcon</string>' \
 			'    <key>CFBundleIdentifier</key>' \
-			'    <string>io.nex.gateway</string>' \
+			'    <string>com.lanyuanxiaoyao.nex</string>' \
 			'    <key>CFBundleInfoDictionaryVersion</key>' \
 			'    <string>6.0</string>' \
+			'    <key>LSApplicationCategoryType</key>' \
+			'    <string>public.app-category.developer-tools</string>' \
 			'    <key>CFBundleName</key>' \
-			'    <string>Nex Gateway</string>' \
+			'    <string>Nex</string>' \
 			'    <key>CFBundleDisplayName</key>' \
-			'    <string>Nex Gateway</string>' \
+			'    <string>Nex</string>' \
 			'    <key>CFBundlePackageType</key>' \
 			'    <string>APPL</string>' \
 			'    <key>CFBundleShortVersionString</key>' \
 			'    <string>1.0.0</string>' \
 			'    <key>CFBundleVersion</key>' \
 			'    <string>1.0.0</string>' \
+			'    <key>NSHumanReadableCopyright</key>' \
+			'    <string>Copyright © 2026 Nex</string>' \
 			'    <key>LSMinimumSystemVersion</key>' \
-			'    <string>10.13</string>' \
+			"    <string>$$MIN_MACOS_VERSION</string>" \
 			'    <key>LSUIElement</key>' \
 			'    <true/>' \
 			'    <key>NSHighResolutionCapable</key>' \
diff --git a/backend/cmd/desktop/dialog_darwin.go b/backend/cmd/desktop/dialog_darwin.go
index 9cfe217..baa7fc1 100644
--- a/backend/cmd/desktop/dialog_darwin.go
+++ b/backend/cmd/desktop/dialog_darwin.go
@@ -19,9 +19,8 @@ func showError(title, message string) {
 }
 
 func showAbout() {
-	message := "Nex Gateway\n\nAI Gateway - 统一的大模型 API 网关\n\nhttps://github.com/nex/gateway"
-	script := fmt.Sprintf(`display dialog "%s" buttons {"OK"} default button "OK" with title "关于 Nex Gateway"`,
-		escapeAppleScript(message))
+	script := fmt.Sprintf(`display dialog "%s" buttons {"OK"} default button "OK" with title "%s"`,
+		escapeAppleScript(aboutMessage()), escapeAppleScript(appAboutTitle))
 	if err := exec.Command("osascript", "-e", script).Run(); err != nil {
 		dialogLogger().Warn("显示关于对话框失败", zap.Error(err))
 	}
diff --git a/backend/cmd/desktop/dialog_linux.go b/backend/cmd/desktop/dialog_linux.go
index 3bf7159..ee678d4 100644
--- a/backend/cmd/desktop/dialog_linux.go
+++ b/backend/cmd/desktop/dialog_linux.go
@@ -67,21 +67,19 @@ func showError(title, message string) {
 }
 
 func showAbout() {
-	message := "Nex Gateway\n\nAI Gateway - 统一的大模型 API 网关\n\nhttps://github.com/nex/gateway"
-
 	switch dialogTool {
 	case toolZenity:
 		exec.Command("zenity", "--info",
-			"--title=关于 Nex Gateway",
-			fmt.Sprintf("--text=%s", message)).Run()
+			fmt.Sprintf("--title=%s", appAboutTitle),
+			fmt.Sprintf("--text=%s", aboutMessage())).Run()
 	case toolKdialog:
-		exec.Command("kdialog", "--msgbox", message, "--title", "关于 Nex Gateway").Run()
+		exec.Command("kdialog", "--msgbox", aboutMessage(), "--title", appAboutTitle).Run()
 	case toolNotifySend:
-		exec.Command("notify-send", "关于 Nex Gateway", message).Run()
+		exec.Command("notify-send", appAboutTitle, aboutMessage()).Run()
 	case toolXmessage:
 		exec.Command("xmessage", "-center",
-			fmt.Sprintf("关于 Nex Gateway: %s", message)).Run()
+			fmt.Sprintf("%s: %s", appAboutTitle, aboutMessage())).Run()
 	default:
-		dialogLogger().Info("关于 Nex Gateway")
+		dialogLogger().Info(appAboutTitle)
 	}
 }
diff --git a/backend/cmd/desktop/dialog_windows.go b/backend/cmd/desktop/dialog_windows.go
index 0ee461d..f95b915 100644
--- a/backend/cmd/desktop/dialog_windows.go
+++ b/backend/cmd/desktop/dialog_windows.go
@@ -22,8 +22,7 @@ func showError(title, message string) {
 }
 
 func showAbout() {
-	message := "Nex Gateway\n\nAI Gateway - 统一的大模型 API 网关\n\nhttps://github.com/nex/gateway"
-	messageBox("关于 Nex Gateway", message, MB_ICONINFORMATION)
+	messageBox(appAboutTitle, aboutMessage(), MB_ICONINFORMATION)
 }
 
 func messageBox(title, message string, flags uint) {
diff --git a/backend/cmd/desktop/main.go b/backend/cmd/desktop/main.go
index 5dfdc96..d2a3545 100644
--- a/backend/cmd/desktop/main.go
+++ b/backend/cmd/desktop/main.go
@@ -49,7 +49,7 @@ func main() {
 	singleLock := NewSingletonLock(filepath.Join(os.TempDir(), "nex-gateway.lock"))
 	if err := singleLock.Lock(); err != nil {
 		minimalLogger.Error("已有 Nex 实例运行")
-		showError("Nex Gateway", "已有 Nex 实例运行")
+		showError(appName, "已有 Nex 实例运行")
 		os.Exit(1)
 	}
 	defer func() {
@@ -60,7 +60,7 @@ func main() {
 
 	if err := checkPortAvailable(port); err != nil {
 		minimalLogger.Error("端口不可用", zap.Error(err))
-		showError("Nex Gateway", err.Error())
+		showError(appName, err.Error())
 		return
 	}
 
@@ -278,8 +278,7 @@ func setupSystray(port int) {
 			zapLogger.Error("无法加载托盘图标", zap.Error(err))
 		}
 		systray.SetIcon(icon)
-		systray.SetTitle("Nex Gateway")
-		systray.SetTooltip("AI Gateway")
+		systray.SetTooltip(appTooltip)
 
 		mOpen := systray.AddMenuItem("打开管理界面", "在浏览器中打开")
 		systray.AddSeparator()
diff --git a/backend/cmd/desktop/metadata.go b/backend/cmd/desktop/metadata.go
new file mode 100644
index 0000000..100cc66
--- /dev/null
+++ b/backend/cmd/desktop/metadata.go
@@ -0,0 +1,13 @@
+package main
+
+const (
+	appName        = "Nex"
+	appTooltip     = appName
+	appAboutTitle  = "关于 " + appName
+	appDescription = "AI Gateway - 统一的大模型 API 网关"
+	appWebsite     = "https://github.com/nex/gateway"
+)
+
+func aboutMessage() string {
+	return appName + "\n\n" + appDescription + "\n\n" + appWebsite
+}
diff --git a/backend/cmd/desktop/metadata_test.go b/backend/cmd/desktop/metadata_test.go
new file mode 100644
index 0000000..8827705
--- /dev/null
+++ b/backend/cmd/desktop/metadata_test.go
@@ -0,0 +1,24 @@
+package main
+
+import "testing"
+
+func TestAboutMessage(t *testing.T) {
+	expected := "Nex\n\nAI Gateway - 统一的大模型 API 网关\n\nhttps://github.com/nex/gateway"
+	if got := aboutMessage(); got != expected {
+		t.Fatalf("aboutMessage() = %q, want %q", got, expected)
+	}
+}
+
+func TestDesktopMetadata(t *testing.T) {
+	if appName != "Nex" {
+		t.Fatalf("appName = %q, want %q", appName, "Nex")
+	}
+
+	if appTooltip != appName {
+		t.Fatalf("appTooltip = %q, want %q", appTooltip, appName)
+	}
+
+	if appAboutTitle != "关于 Nex" {
+		t.Fatalf("appAboutTitle = %q, want %q", appAboutTitle, "关于 Nex")
+	}
+}
diff --git a/backend/cmd/desktop/port_test.go b/backend/cmd/desktop/port_test.go
index 4d65a8e..6116a30 100644
--- a/backend/cmd/desktop/port_test.go
+++ b/backend/cmd/desktop/port_test.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"errors"
 	"net"
 	"net/http"
 	"testing"
@@ -21,19 +22,12 @@ func TestCheckPortAvailable(t *testing.T) {
 func TestCheckPortOccupied(t *testing.T) {
 	port := 19827
 
-	listener, err := net.Listen("tcp", "127.0.0.1:19827")
+	listener, err := net.Listen("tcp", ":19827")
 	if err != nil {
 		t.Fatalf("无法启动测试服务器: %v", err)
 	}
 	defer listener.Close()
 
-	go func() {
-		conn, err := listener.Accept()
-		if err == nil {
-			conn.Close()
-		}
-	}()
-
 	time.Sleep(100 * time.Millisecond)
 
 	err = checkPortAvailable(port)
@@ -56,7 +50,7 @@ func TestCheckPortAvailableAfterClose(t *testing.T) {
 	defer server.Close()
 	go func() {
 		err := server.Serve(listener)
-		if err != nil && err != http.ErrServerClosed {
+		if err != nil && err != http.ErrServerClosed && !errors.Is(err, net.ErrClosed) {
 			t.Errorf("serve failed: %v", err)
 		}
 	}()