diff --git a/CodeEdit.xcodeproj/project.pbxproj b/CodeEdit.xcodeproj/project.pbxproj
index c405bfb973..9267bff297 100644
--- a/CodeEdit.xcodeproj/project.pbxproj
+++ b/CodeEdit.xcodeproj/project.pbxproj
@@ -35,6 +35,7 @@
 		34EE19BE27E0469C00F152CE /* BlurView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 34EE19BD27E0469C00F152CE /* BlurView.swift */; };
 		5C403B8F27E20F8000788241 /* WorkspaceClient in Frameworks */ = {isa = PBXBuildFile; productRef = 5C403B8E27E20F8000788241 /* WorkspaceClient */; };
 		5CF38A5E27E48E6C0096A0F7 /* CodeFile in Frameworks */ = {isa = PBXBuildFile; productRef = 5CF38A5D27E48E6C0096A0F7 /* CodeFile */; };
+		90571F6027E89210006E606C /* CodeEdit.swift in Sources */ = {isa = PBXBuildFile; fileRef = 90571F5F27E89210006E606C /* CodeEdit.swift */; };
 		B658FB3427DA9E1000EA4DBD /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = B658FB3327DA9E1000EA4DBD /* Assets.xcassets */; };
 		B658FB3727DA9E1000EA4DBD /* Preview Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = B658FB3627DA9E1000EA4DBD /* Preview Assets.xcassets */; };
 		B65E614627E6765D00255275 /* Introspect in Frameworks */ = {isa = PBXBuildFile; productRef = B65E614527E6765D00255275 /* Introspect */; };
@@ -96,6 +97,7 @@
 		34EE19BD27E0469C00F152CE /* BlurView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BlurView.swift; sourceTree = "<group>"; };
 		5E3C6A3427E72AE000A7CA0D /* fr */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = fr; path = fr.lproj/Localizable.strings; sourceTree = "<group>"; };
 		70F2E28327E848720002BA81 /* zh-Hans */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = "zh-Hans"; path = "zh-Hans.lproj/Localizable.strings"; sourceTree = "<group>"; };
+		90571F5F27E89210006E606C /* CodeEdit.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CodeEdit.swift; sourceTree = "<group>"; };
 		B658FB2C27DA9E0F00EA4DBD /* CodeEdit.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = CodeEdit.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		B658FB3127DA9E0F00EA4DBD /* WorkspaceView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WorkspaceView.swift; sourceTree = "<group>"; };
 		B658FB3327DA9E1000EA4DBD /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
@@ -267,6 +269,7 @@
 				B658FB3827DA9E1000EA4DBD /* CodeEdit.entitlements */,
 				B658FB3527DA9E1000EA4DBD /* Preview Content */,
 				043C321927E32295006AE443 /* MainMenu.xib */,
+				90571F5F27E89210006E606C /* CodeEdit.swift */,
 			);
 			path = CodeEdit;
 			sourceTree = "<group>";
@@ -492,6 +495,7 @@
 			files = (
 				2B7A583527E4BA0100D25D4E /* AppDelegate.swift in Sources */,
 				2875A46D27E3BE5B007805F8 /* BreadcrumbsView.swift in Sources */,
+				90571F6027E89210006E606C /* CodeEdit.swift in Sources */,
 				0485EB1D27E7338100138301 /* QuickOpenItem.swift in Sources */,
 				04540D5B27DD08C300E91B77 /* SettingsView.swift in Sources */,
 				D72E1A8927E44D7C00EB11B9 /* WelcomeWindowView.swift in Sources */,
diff --git a/CodeEdit.xcodeproj/xcshareddata/xcschemes/CodeEdit.xcscheme b/CodeEdit.xcodeproj/xcshareddata/xcschemes/CodeEdit.xcscheme
index d92ea28491..0ca4d11bbe 100644
--- a/CodeEdit.xcodeproj/xcshareddata/xcschemes/CodeEdit.xcscheme
+++ b/CodeEdit.xcodeproj/xcshareddata/xcschemes/CodeEdit.xcscheme
@@ -70,6 +70,13 @@
             ReferencedContainer = "container:CodeEdit.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "OS_ACTIVITY_MODE"
+            value = "disable"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
diff --git a/CodeEdit/AppDelegate.swift b/CodeEdit/AppDelegate.swift
index f68421ace5..f6ded472d7 100644
--- a/CodeEdit/AppDelegate.swift
+++ b/CodeEdit/AppDelegate.swift
@@ -9,61 +9,54 @@ import SwiftUI
 
 class CodeEditApplication: NSApplication {
     let strongDelegate = AppDelegate()
-
     override init() {
         super.init()
         self.delegate = strongDelegate
     }
-
     required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
-
 }
 
-@NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate, ObservableObject {
+    private(set) var menu: NSMenu! = nil
     func applicationWillFinishLaunching(_ notification: Notification) {
         _ = CodeEditDocumentController.shared
+        let nib = NSNib(nibNamed: NSNib.Name("MainMenu"), bundle: Bundle.main)
+        nib?.instantiate(withOwner: NSApplication.shared, topLevelObjects: nil)
+        NSApplication.shared.mainMenu?.items
+            .first { $0.title == "CodeEdit" }?.submenu?.items
+            .first { $0.title == "Preferences" }?.action = #selector(openPreferences(_:))
+        menu = NSApplication.shared.mainMenu
     }
-
     func applicationDidFinishLaunching(_ notification: Notification) {
         if let appearanceString = UserDefaults.standard.string(forKey: Appearances.storageKey) {
             Appearances(rawValue: appearanceString)?.applyAppearance()
         }
-
         DispatchQueue.main.async {
             if NSApp.windows.isEmpty {
                 self.handleOpen()
             }
         }
     }
-
     func applicationWillTerminate(_ aNotification: Notification) {
     }
-
     func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
         return true
     }
-
     func applicationShouldHandleReopen(_ sender: NSApplication, hasVisibleWindows flag: Bool) -> Bool {
         if flag {
             return false
         }
-
         handleOpen()
-
         return false
     }
-
     func applicationShouldOpenUntitledFile(_ sender: NSApplication) -> Bool {
         return false
     }
-
     func handleOpen() {
         let behavior = ReopenBehavior(rawValue: UserDefaults.standard.string(forKey: ReopenBehavior.storageKey)
                                       ?? ReopenBehavior.default.rawValue) ?? ReopenBehavior.default
-
         switch behavior {
         case .welcome:
             openWelcome(self)
@@ -73,7 +66,6 @@ class AppDelegate: NSObject, NSApplicationDelegate, ObservableObject {
             CodeEditDocumentController.shared.newDocument(self)
         }
     }
-
     func applicationShouldTerminate(_ sender: NSApplication) -> NSApplication.TerminateReply {
         CodeEditDocumentController.shared.documents.flatMap { doc in
             return doc.windowControllers
@@ -86,29 +78,10 @@ class AppDelegate: NSObject, NSApplicationDelegate, ObservableObject {
     }
 
     // MARK: - Open windows
-
-    @IBAction func openPreferences(_ sender: Any) {
-        if let window = NSApp.windows.filter({ window in
-            return (window.contentView as? NSHostingView<SettingsView>) != nil
-        }).first {
-            window.makeKeyAndOrderFront(self)
-            return
-        }
-
-        let window = NSWindow(
-            contentRect: NSRect(x: 0, y: 0, width: 500, height: 400),
-            styleMask: [.titled, .closable],
-            backing: .buffered, defer: false)
-        window.center()
-        window.toolbar = NSToolbar()
-        window.title = "Settings"
-        window.toolbarStyle = .unifiedCompact
-        _ = NSWindowController(window: window)
-        let contentView = SettingsView()
-        window.contentView = NSHostingView(rootView: contentView)
-        window.makeKeyAndOrderFront(sender)
+    @objc func openPreferences(_ sender: Any) {
+        NSApp.sendAction(Selector(("showPreferencesWindow:")), to: nil, from: nil)
+        NSApplication.shared.mainMenu = menu
     }
-
     @IBAction func openWelcome(_ sender: Any) {
         if let window = NSApp.windows.filter({ window in
             return (window.contentView as? NSHostingView<WelcomeWindowView>) != nil
@@ -116,7 +89,6 @@ class AppDelegate: NSObject, NSApplicationDelegate, ObservableObject {
             window.makeKeyAndOrderFront(self)
             return
         }
-
         let window = NSWindow(contentRect: NSRect(x: 0, y: 0, width: 800, height: 460),
                               styleMask: [.titled, .fullSizeContentView], backing: .buffered, defer: false)
         let windowController = NSWindowController(window: window)
diff --git a/CodeEdit/CodeEdit.swift b/CodeEdit/CodeEdit.swift
new file mode 100644
index 0000000000..fff6ea8950
--- /dev/null
+++ b/CodeEdit/CodeEdit.swift
@@ -0,0 +1,23 @@
+//
+//  CodeEdit.swift
+//  CodeEdit
+//
+//  Created by 朱浩宇 on 2022/3/21.
+//
+
+import SwiftUI
+
+@main
+struct CodeEdit: App {
+    @NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
+    var body: some Scene {
+        Settings {
+            SettingsView()
+                .frame(width: 500)
+                .task {
+                    try? await Task.sleep(nanoseconds: NSEC_PER_MSEC)
+                    NSApp.keyWindow?.center()
+                }
+        }
+    }
+}
diff --git a/CodeEdit/Info.plist b/CodeEdit/Info.plist
index 16de6697dc..34da852161 100644
--- a/CodeEdit/Info.plist
+++ b/CodeEdit/Info.plist
@@ -38,6 +38,8 @@
 		<dict>
 			<key>CFBundleTypeRole</key>
 			<string>Editor</string>
+			<key>CFBundleURLName</key>
+			<string>austincondiff.CodeEdit.url</string>
 			<key>CFBundleURLSchemes</key>
 			<array>
 				<string>codeedit</string>
diff --git a/CodeEdit/MainMenu.xib b/CodeEdit/MainMenu.xib
index 605193b449..7eb6ed570d 100644
--- a/CodeEdit/MainMenu.xib
+++ b/CodeEdit/MainMenu.xib
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="19529" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="20037" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="19529"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="20037"/>
     </dependencies>
     <objects>
         <customObject id="-2" userLabel="File's Owner" customClass="NSApplication"/>
@@ -21,11 +21,7 @@
                                 </connections>
                             </menuItem>
                             <menuItem isSeparatorItem="YES" id="VOq-y0-SEH"/>
-                            <menuItem title="Preferences…" keyEquivalent="," id="BOF-NM-1cW">
-                                <connections>
-                                    <action selector="openPreferences:" target="-1" id="B4U-I4-Bxm"/>
-                                </connections>
-                            </menuItem>
+                            <menuItem title="Preferences" keyEquivalent="," id="BOF-NM-1cW"/>
                             <menuItem isSeparatorItem="YES" id="wFC-TO-SCJ"/>
                             <menuItem title="Services" id="NMo-om-nkz">
                                 <modifierMask key="keyEquivalentModifierMask"/>
diff --git a/CodeEdit/Settings/GeneralSettingsView.swift b/CodeEdit/Settings/GeneralSettingsView.swift
index 91d07a9f17..f13fa0e0e5 100644
--- a/CodeEdit/Settings/GeneralSettingsView.swift
+++ b/CodeEdit/Settings/GeneralSettingsView.swift
@@ -30,6 +30,7 @@ struct GeneralSettingsView: View {
             .onChange(of: appearance) { tag in
                 tag.applyAppearance()
             }
+            .fixedSize()
 
 			Picker("File Icon Style".localized(), selection: $fileIconStyle) {
 				Text("Color".localized())
@@ -37,6 +38,7 @@ struct GeneralSettingsView: View {
 				Text("Monochrome".localized())
 					.tag(FileIconStyle.monochrome)
 			}
+            .fixedSize()
 
 			Picker("Reopen Behavior".localized(), selection: $reopenBehavior) {
                 Text("Welcome Screen".localized())
@@ -47,6 +49,7 @@ struct GeneralSettingsView: View {
 				Text("New Document".localized())
                     .tag(ReopenBehavior.newDocument)
             }
+            .fixedSize()
 
 			Picker("Editor Theme".localized(), selection: $editorTheme) {
 				Text("Atelier Savanna (Auto)")
@@ -63,7 +66,9 @@ struct GeneralSettingsView: View {
 				Text("Ocean")
 					.tag(CodeEditor.ThemeName.ocean)
 			}
+            .fixedSize()
         }
+        .frame(width: 450)
         .padding()
     }
 }
diff --git a/CodeEdit/Settings/SettingsView.swift b/CodeEdit/Settings/SettingsView.swift
index 6549f479a9..c38478e7f1 100644
--- a/CodeEdit/Settings/SettingsView.swift
+++ b/CodeEdit/Settings/SettingsView.swift
@@ -15,8 +15,6 @@ struct SettingsView: View {
 					Label("General".localized(), systemImage: "gearshape")
                 }
         }
-        .padding()
-        .frame(width: 450, height: 250)
     }
 }