diff --git a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
index 24653acdd1..ba3740214a 100644
--- a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
@@ -65,7 +65,7 @@ void ControllerInterface::Initialize(const WindowSystemInfo& wsi)
 // nothing needed
 #endif
 #ifdef CIFACE_USE_OSX
-// nothing needed for Quartz
+  m_input_backends.emplace_back(ciface::Quartz::CreateInputBackend(this));
 #endif
 #ifdef CIFACE_USE_SDL
   m_input_backends.emplace_back(ciface::SDL::CreateInputBackend(this));
@@ -166,12 +166,6 @@ void ControllerInterface::RefreshDevices(RefreshReason reason)
   if (m_wsi.type == WindowSystemType::X11)
     ciface::XInput2::PopulateDevices(m_wsi.render_window);
 #endif
-#ifdef CIFACE_USE_OSX
-  if (m_wsi.type == WindowSystemType::MacOS)
-  {
-    ciface::Quartz::PopulateDevices(m_wsi.render_window);
-  }
-#endif
 #ifdef CIFACE_USE_ANDROID
   ciface::Android::PopulateDevices();
 #endif
@@ -223,9 +217,6 @@ void ControllerInterface::Shutdown()
 #ifdef CIFACE_USE_XLIB
 // nothing needed
 #endif
-#ifdef CIFACE_USE_OSX
-  ciface::Quartz::DeInit();
-#endif
 #ifdef CIFACE_USE_ANDROID
   ciface::Android::Shutdown();
 #endif
diff --git a/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.h b/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.h
index 8818425344..34219e9828 100644
--- a/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.h
+++ b/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.h
@@ -3,8 +3,9 @@
 
 #pragma once
 
+#include "InputCommon/ControllerInterface/InputBackend.h"
+
 namespace ciface::Quartz
 {
-void PopulateDevices(void* window);
-void DeInit();
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);
 }  // namespace ciface::Quartz
diff --git a/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.mm b/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.mm
index 22dc4074d9..75054f08b9 100644
--- a/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.mm
+++ b/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.mm
@@ -7,15 +7,25 @@
 
 namespace ciface::Quartz
 {
-void PopulateDevices(void* window)
+class InputBackend final : public ciface::InputBackend
 {
-  if (!window)
+public:
+  using ciface::InputBackend::InputBackend;
+  void PopulateDevices() override;
+};
+
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface)
+{
+  return std::make_unique<InputBackend>(controller_interface);
+}
+
+void InputBackend::PopulateDevices()
+{
+  const WindowSystemInfo wsi = GetControllerInterface().GetWindowSystemInfo();
+  if (wsi.type != WindowSystemType::MacOS)
     return;
 
-  g_controller_interface.AddDevice(std::make_shared<KeyboardAndMouse>(window));
+  GetControllerInterface().AddDevice(std::make_shared<KeyboardAndMouse>(wsi.render_window));
 }
 
-void DeInit()
-{
-}
 }  // namespace ciface::Quartz
diff --git a/Source/Core/InputCommon/ControllerInterface/Quartz/QuartzKeyboardAndMouse.mm b/Source/Core/InputCommon/ControllerInterface/Quartz/QuartzKeyboardAndMouse.mm
index e41c370edf..b21eb48ab4 100644
--- a/Source/Core/InputCommon/ControllerInterface/Quartz/QuartzKeyboardAndMouse.mm
+++ b/Source/Core/InputCommon/ControllerInterface/Quartz/QuartzKeyboardAndMouse.mm
@@ -12,6 +12,7 @@
 #include "Core/Host.h"
 
 #include "InputCommon/ControllerInterface/ControllerInterface.h"
+#include "InputCommon/ControllerInterface/Quartz/Quartz.h"
 
 /// Helper class to get window position data from threads other than the main thread
 @interface DolWindowPositionObserver : NSObject