diff --git a/AppTracker.cpp b/AppTracker.cpp
index 7c8f48a..3ccf320 100644
--- a/AppTracker.cpp
+++ b/AppTracker.cpp
@@ -14,6 +14,8 @@ AppTracker::AppTracker()
     windowTracker = std::make_unique<WindowsTracker>();
 #elif __linux__
     windowTracker = std::make_unique<LinuxTracker>();
+#elif __APPLE__
+    windowTracker = std::make_unique<MacOSTracker>();
 #else
     throw std::runtime_error("Unsupported OS");
 #endif
diff --git a/IWindowInterface.cpp b/IWindowInterface.cpp
index 49e3098..a25fc99 100644
--- a/IWindowInterface.cpp
+++ b/IWindowInterface.cpp
@@ -166,4 +166,9 @@ void LinuxTracker::startTracking()
 
     XCloseDisplay(display);
 }
-#endif
\ No newline at end of file
+#endif
+
+// TODO
+void MacOSTracker::startTracking() {
+    throw std::runtime_error("MacOS has not been implemented yet!");
+}
\ No newline at end of file