diff --git a/bec_widgets/cli/client.py b/bec_widgets/cli/client.py
index 7933e42e..2667c9e4 100644
--- a/bec_widgets/cli/client.py
+++ b/bec_widgets/cli/client.py
@@ -29,6 +29,7 @@ class _WidgetsEnumType(str, enum.Enum):
 _Widgets = {
     "AbortButton": "AbortButton",
     "BECDockArea": "BECDockArea",
+    "BECMainWindow": "BECMainWindow",
     "BECProgressBar": "BECProgressBar",
     "BECQueue": "BECQueue",
     "BECStatusBox": "BECStatusBox",
@@ -427,6 +428,14 @@ class BECDockArea(RPCBase):
         """
 
 
+class BECMainWindow(RPCBase):
+    @rpc_call
+    def remove(self):
+        """
+        Cleanup the BECConnector
+        """
+
+
 class BECProgressBar(RPCBase):
     """A custom progress bar with smooth transitions. The displayed text can be customized using a template."""
 
@@ -4511,14 +4520,6 @@ class TextBox(RPCBase):
         """
 
 
-class UILaunchWindow(RPCBase):
-    @rpc_call
-    def remove(self):
-        """
-        Cleanup the BECConnector
-        """
-
-
 class VSCodeEditor(RPCBase):
     """A widget to display the VSCode editor."""
 
diff --git a/bec_widgets/widgets/containers/auto_update/auto_updates.py b/bec_widgets/widgets/containers/auto_update/auto_updates.py
index ce604044..ed477726 100644
--- a/bec_widgets/widgets/containers/auto_update/auto_updates.py
+++ b/bec_widgets/widgets/containers/auto_update/auto_updates.py
@@ -27,6 +27,7 @@ class AutoUpdates(BECMainWindow):
     _default_dock: BECDock
     USER_ACCESS = ["enabled", "enabled.setter", "selected_device", "selected_device.setter"]
     RPC = True
+    PLUGIN = False
 
     # enforce that subclasses have the same rpc widget class
     rpc_widget_class = "AutoUpdates"
diff --git a/bec_widgets/widgets/containers/main_window/bec_main_window.pyproject b/bec_widgets/widgets/containers/main_window/bec_main_window.pyproject
new file mode 100644
index 00000000..ff247afd
--- /dev/null
+++ b/bec_widgets/widgets/containers/main_window/bec_main_window.pyproject
@@ -0,0 +1 @@
+{'files': ['main_window.py']}
\ No newline at end of file
diff --git a/bec_widgets/widgets/containers/main_window/bec_main_window_plugin.py b/bec_widgets/widgets/containers/main_window/bec_main_window_plugin.py
new file mode 100644
index 00000000..d4edf9ac
--- /dev/null
+++ b/bec_widgets/widgets/containers/main_window/bec_main_window_plugin.py
@@ -0,0 +1,73 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+from qtpy.QtCore import QSize
+from qtpy.QtDesigner import QDesignerCustomWidgetInterface
+from qtpy.QtGui import QIcon
+from qtpy.QtWidgets import QWidget
+
+from bec_widgets.utils.bec_designer import designer_material_icon
+from bec_widgets.widgets.containers.main_window.main_window import BECMainWindow
+
+DOM_XML = """
+<ui language='c++'>
+    <widget class='BECMainWindow' name='bec_main_window'>
+    </widget>
+</ui>
+"""
+
+
+class BECMainWindowPlugin(QDesignerCustomWidgetInterface):  # pragma: no cover
+    def __init__(self):
+        super().__init__()
+        self._form_editor = None
+
+    def createWidget(self, parent):
+        # We want to initialize BECMainWindow upon starting designer
+        t = BECMainWindow(parent)
+        return t
+
+    def domXml(self):
+        return DOM_XML
+
+    def group(self):
+        return "BEC Containers"
+
+    def icon(self):
+        return designer_material_icon(BECMainWindow.ICON_NAME)
+
+    def includeFile(self):
+        return "bec_main_window"
+
+    def initialize(self, form_editor):
+        import os
+
+        from qtpy.QtCore import Qt
+        from qtpy.QtWidgets import QApplication
+
+        import bec_widgets
+
+        MODULE_PATH = os.path.dirname(bec_widgets.__file__)
+        QApplication.setAttribute(Qt.AA_DontUseNativeMenuBar, True)
+        app = QApplication.instance()
+        icon = QIcon()
+        icon.addFile(
+            os.path.join(MODULE_PATH, "assets", "app_icons", "BEC-General-App.png"),
+            size=QSize(48, 48),
+        )
+        app.setWindowIcon(icon)
+        self._form_editor = form_editor
+
+    def isContainer(self):
+        return True
+
+    def isInitialized(self):
+        return self._form_editor is not None
+
+    def name(self):
+        return "BECMainWindow"
+
+    def toolTip(self):
+        return "BECMainWindow"
+
+    def whatsThis(self):
+        return self.toolTip()
diff --git a/bec_widgets/widgets/containers/main_window/main_window.py b/bec_widgets/widgets/containers/main_window/main_window.py
index dcdec146..7edaff7a 100644
--- a/bec_widgets/widgets/containers/main_window/main_window.py
+++ b/bec_widgets/widgets/containers/main_window/main_window.py
@@ -34,12 +34,13 @@ from bec_widgets.widgets.progress.scan_progressbar.scan_progressbar import ScanP
 
 MODULE_PATH = os.path.dirname(bec_widgets.__file__)
 
+# Ensure the application does not use the native menu bar on macOS to be consistent with linux development.
 QApplication.setAttribute(Qt.AA_DontUseNativeMenuBar, True)
 
 
 class BECMainWindow(BECWidget, QMainWindow):
-    RPC = False
-    PLUGIN = False
+    RPC = True
+    PLUGIN = True
     SCAN_PROGRESS_WIDTH = 100  # px
     STATUS_BAR_WIDGETS_EXPIRE_TIME = 60_000  # milliseconds
 
@@ -493,15 +494,16 @@ class BECMainWindow(BECWidget, QMainWindow):
         super().cleanup()
 
 
-class UILaunchWindow(BECMainWindow):
-    RPC = True
+class BECMainWindowNoRPC(BECMainWindow):
+    RPC = False
+    PLUGIN = False
 
 
 if __name__ == "__main__":
     import sys
 
     app = QApplication(sys.argv)
-    main_window = UILaunchWindow()
+    main_window = BECMainWindow()
     main_window.show()
     main_window.resize(800, 600)
     sys.exit(app.exec())
diff --git a/bec_widgets/widgets/containers/main_window/register_bec_main_window.py b/bec_widgets/widgets/containers/main_window/register_bec_main_window.py
new file mode 100644
index 00000000..2c9bff16
--- /dev/null
+++ b/bec_widgets/widgets/containers/main_window/register_bec_main_window.py
@@ -0,0 +1,17 @@
+def main():  # pragma: no cover
+    from qtpy import PYSIDE6
+
+    if not PYSIDE6:
+        print("PYSIDE6 is not available in the environment. Cannot patch designer.")
+        return
+    from PySide6.QtDesigner import QPyDesignerCustomWidgetCollection
+
+    from bec_widgets.widgets.containers.main_window.bec_main_window_plugin import (
+        BECMainWindowPlugin,
+    )
+
+    QPyDesignerCustomWidgetCollection.addCustomWidget(BECMainWindowPlugin())
+
+
+if __name__ == "__main__":  # pragma: no cover
+    main()
diff --git a/bec_widgets/widgets/utility/widget_finder/widget_finder.py b/bec_widgets/widgets/utility/widget_finder/widget_finder.py
index fb211990..b13a5edb 100644
--- a/bec_widgets/widgets/utility/widget_finder/widget_finder.py
+++ b/bec_widgets/widgets/utility/widget_finder/widget_finder.py
@@ -17,7 +17,7 @@ from qtpy.QtWidgets import (
 
 from bec_widgets import SafeProperty
 from bec_widgets.utils.widget_io import WidgetIO
-from bec_widgets.widgets.containers.main_window.main_window import BECMainWindow
+from bec_widgets.widgets.containers.main_window.main_window import BECMainWindowNoRPC
 from bec_widgets.widgets.plots.image.image import Image
 from bec_widgets.widgets.plots.waveform.waveform import Waveform
 
@@ -179,7 +179,7 @@ class WidgetFinderComboBox(QComboBox):
         event.accept()
 
 
-class InspectorMainWindow(BECMainWindow):  # pragma: no cover
+class InspectorMainWindow(BECMainWindowNoRPC):  # pragma: no cover
     """
     A main window that includes a widget finder combobox to inspect widgets.
     """