diff --git a/aw_watcher_window/macos.swift b/aw_watcher_window/macos.swift
new file mode 100644
index 0000000..be62e53
--- /dev/null
+++ b/aw_watcher_window/macos.swift
@@ -0,0 +1,285 @@
+import Cocoa
+import ScriptingBridge
+
+@objc protocol ChromeTab {
+  @objc optional var URL: String { get }
+  @objc optional var title: String { get }
+}
+
+@objc protocol ChromeWindow {
+  @objc optional var activeTab: ChromeTab { get }
+  @objc optional var mode: String { get }
+}
+
+extension SBObject: ChromeWindow, ChromeTab {}
+
+@objc protocol ChromeProtocol {
+  @objc optional func windows() -> [ChromeWindow]
+}
+
+extension SBApplication: ChromeProtocol {}
+
+struct NetworkMessage: Codable {
+  var app: String
+  var title: String
+  var url: String?
+}
+
+struct Heartbeat: Codable {
+  var timestamp: Date
+  var data: NetworkMessage
+}
+
+struct Bucket: Codable {
+  var client: String
+  var type: String
+  var hostname: String
+}
+
+let clientHostname = ProcessInfo.processInfo.hostName
+let clientName = "aw-watcher-window2"
+let bucketName = "\(clientName)_\(clientHostname)"
+
+let main = MainThing()
+var oldHeartbeatData: NetworkMessage?
+
+let encoder = JSONEncoder()
+let formatter = ISO8601DateFormatter()
+formatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
+
+encoder.dateEncodingStrategy = .custom({ date, encoder in
+  var container = encoder.singleValueContainer()
+  let dateString = formatter.string(from: date)
+  try container.encode(dateString)
+})
+
+start()
+RunLoop.main.run()
+
+func start() {
+  guard checkAccess() else {
+    DispatchQueue.main.asyncAfter(deadline: .now() + 10) {
+      start()
+    }
+    return
+  }
+
+  createBucket()
+
+  NSWorkspace.shared.notificationCenter.addObserver(
+    main, selector: #selector(main.focusedAppChanged),
+    name: NSWorkspace.didActivateApplicationNotification,
+    object: nil)
+  main.focusedAppChanged()
+  detectIdle()
+}
+
+func detectIdle() {
+  let seconds = 15.0 - SystemIdleTime()!
+  if seconds < 0.0 {
+    sendHeartbeat(data: NetworkMessage(app: "", title: ""))
+
+    var monitor: Any?
+    monitor = NSEvent.addGlobalMonitorForEvents(matching: [
+      .mouseMoved, .leftMouseDown, .rightMouseDown, .keyDown,
+    ]) { e in
+      NSEvent.removeMonitor(monitor!)
+      if let oldMenu = oldHeartbeatData { sendHeartbeat(data: oldMenu) }
+      detectIdle()
+    }
+
+    return
+  }
+
+  DispatchQueue.main.asyncAfter(deadline: .now() + seconds) {
+    detectIdle()
+  }
+}
+
+func createBucket() {
+  let payload = try! encoder.encode(
+    Bucket(client: clientName, type: "currentwindow", hostname: clientHostname))
+
+  let url = URL(string: "http://localhost:5600/api/0/buckets/\(bucketName)")!
+  Task {
+    var urlRequest = URLRequest(url: url)
+    urlRequest.httpMethod = "POST"
+    urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
+    let (_, response) = try await URLSession.shared.upload(for: urlRequest, from: payload)
+    guard (200...299).contains((response as! HTTPURLResponse).statusCode) else {
+      print("Failed to create bucket")
+      return
+    }
+  }
+}
+
+func sendHeartbeat(data: NetworkMessage) {
+  let payload0 = oldHeartbeatData.map {
+    try! encoder.encode(Heartbeat(timestamp: Date.now, data: $0))
+  }
+  let payload = try! encoder.encode(Heartbeat(timestamp: Date.now, data: data))
+
+  let url = URL(string: "http://localhost:5600/api/0/buckets/\(bucketName)/heartbeat?pulsetime=999999")!
+  Task {
+    if let payload0 = payload0 {
+      var urlRequest = URLRequest(url: url)
+      urlRequest.httpMethod = "POST"
+      urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
+      let (_, response) = try await URLSession.shared.upload(for: urlRequest, from: payload0)
+      guard (200...299).contains((response as! HTTPURLResponse).statusCode) else {
+        print("Failed to send window exit heartbeat")
+        return
+      }
+    }
+
+    var urlRequest = URLRequest(url: url)
+    urlRequest.httpMethod = "POST"
+    urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
+    let (_, response) = try await URLSession.shared.upload(for: urlRequest, from: payload)
+    guard (200...299).contains((response as! HTTPURLResponse).statusCode) else {
+      print("Failed to send window enter heartbeat")
+      return
+    }
+
+  }
+}
+
+class MainThing {
+  var observer: AXObserver?
+  var oldWindow: AXUIElement?
+  var idle = false
+
+  func windowTitleChanged(
+    _ axObserver: AXObserver,
+    axElement: AXUIElement,
+    notification: CFString
+  ) {
+
+    let frontmost = NSWorkspace.shared.frontmostApplication!
+    var windowTitle: AnyObject?
+    AXUIElementCopyAttributeValue(axElement, kAXTitleAttribute as CFString, &windowTitle)
+
+    var data = NetworkMessage(app: frontmost.localizedName!, title: windowTitle as? String ?? "")
+
+    if frontmost.localizedName == "Google Chrome" {
+      let chromeObject: ChromeProtocol = SBApplication.init(bundleIdentifier: "com.google.Chrome")!
+
+      let frontWindow = chromeObject.windows!()[0]
+      let activeTab = frontWindow.activeTab!
+
+      if frontWindow.mode == "incognito" {
+        data = NetworkMessage(app: "", title: "")
+      } else {
+        data.url = activeTab.URL
+        if let title = activeTab.title { data.title = title }
+      }
+    }
+
+    sendHeartbeat(data: data)
+    oldHeartbeatData = data
+  }
+
+  @objc func focusedWindowChanged(_ observer: AXObserver, window: AXUIElement) {
+    if oldWindow != nil {
+      AXObserverRemoveNotification(
+        observer, oldWindow!, kAXFocusedWindowChangedNotification as CFString)
+    }
+
+    let selfPtr = UnsafeMutableRawPointer(Unmanaged.passUnretained(self).toOpaque())
+    AXObserverAddNotification(observer, window, kAXTitleChangedNotification as CFString, selfPtr)
+
+    windowTitleChanged(
+      observer, axElement: window, notification: kAXTitleChangedNotification as CFString)
+
+    oldWindow = window
+  }
+
+  @objc func focusedAppChanged() {
+    if observer != nil {
+      CFRunLoopRemoveSource(
+        RunLoop.current.getCFRunLoop(),
+        AXObserverGetRunLoopSource(observer!),
+        CFRunLoopMode.defaultMode)
+    }
+
+    let frontmost = NSWorkspace.shared.frontmostApplication!
+    let pid = frontmost.processIdentifier
+    let focusedApp = AXUIElementCreateApplication(pid)
+
+    AXObserverCreate(
+      pid,
+      {
+        (
+          _ axObserver: AXObserver,
+          axElement: AXUIElement,
+          notification: CFString,
+          userData: UnsafeMutableRawPointer?
+        ) -> Void in
+        guard let userData = userData else {
+          print("Missing userData")
+          return
+        }
+        let application = Unmanaged<MainThing>.fromOpaque(userData).takeUnretainedValue()
+        if notification == kAXFocusedWindowChangedNotification as CFString {
+          application.focusedWindowChanged(axObserver, window: axElement)
+        } else {
+          application.windowTitleChanged(
+            axObserver, axElement: axElement, notification: notification)
+        }
+      }, &observer)
+
+    let selfPtr = UnsafeMutableRawPointer(Unmanaged.passUnretained(self).toOpaque())
+    AXObserverAddNotification(
+      observer!, focusedApp, kAXFocusedWindowChangedNotification as CFString, selfPtr)
+
+    CFRunLoopAddSource(
+      RunLoop.current.getCFRunLoop(),
+      AXObserverGetRunLoopSource(observer!),
+      CFRunLoopMode.defaultMode)
+
+    var focusedWindow: AnyObject?
+    AXUIElementCopyAttributeValue(focusedApp, kAXFocusedWindowAttribute as CFString, &focusedWindow)
+
+    if focusedWindow != nil {
+      focusedWindowChanged(observer!, window: focusedWindow as! AXUIElement)
+    }
+  }
+}
+
+func checkAccess() -> Bool {
+  let checkOptPrompt = kAXTrustedCheckOptionPrompt.takeUnretainedValue() as NSString
+  let options = [checkOptPrompt: true]
+  let accessEnabled = AXIsProcessTrustedWithOptions(options as CFDictionary?)
+  return accessEnabled
+}
+
+func SystemIdleTime() -> Double? {
+  var iterator: io_iterator_t = 0
+  defer { IOObjectRelease(iterator) }
+  guard
+    IOServiceGetMatchingServices(kIOMainPortDefault, IOServiceMatching("IOHIDSystem"), &iterator)
+      == KERN_SUCCESS
+  else {
+    return nil
+  }
+
+  let entry: io_registry_entry_t = IOIteratorNext(iterator)
+  defer { IOObjectRelease(entry) }
+  guard entry != 0 else { return nil }
+
+  var unmanagedDict: Unmanaged<CFMutableDictionary>? = nil
+  defer { unmanagedDict?.release() }
+  guard
+    IORegistryEntryCreateCFProperties(entry, &unmanagedDict, kCFAllocatorDefault, 0) == KERN_SUCCESS
+  else { return nil }
+  guard let dict = unmanagedDict?.takeUnretainedValue() else { return nil }
+
+  let key: CFString = "HIDIdleTime" as CFString
+  let value = CFDictionaryGetValue(dict, Unmanaged.passUnretained(key).toOpaque())
+  let number: CFNumber = unsafeBitCast(value, to: CFNumber.self)
+  var nanoseconds: Int64 = 0
+  guard CFNumberGetValue(number, CFNumberType.sInt64Type, &nanoseconds) else { return nil }
+  let interval = Double(nanoseconds) / Double(NSEC_PER_SEC)
+
+  return interval
+}