diff --git a/qt/aqt/theme.py b/qt/aqt/theme.py
index ad771f653..20df25cef 100644
--- a/qt/aqt/theme.py
+++ b/qt/aqt/theme.py
@@ -24,6 +24,7 @@ from aqt.qt import (
     QPixmap,
     QStyleFactory,
     Qt,
+    qtmajor,
 )
 
 
@@ -266,7 +267,7 @@ class ThemeManager:
     def _apply_palette(self, app: QApplication) -> None:
         set_macos_dark_mode(self.night_mode)
 
-        if is_mac and not aqt.mw.pm.force_custom_styles():
+        if is_mac and not (qtmajor == 5 or aqt.mw.pm.force_custom_styles()):
             app.setStyle(QStyleFactory.create(self._default_style))  # type: ignore
             self.default_palette.setColor(
                 QPalette.ColorRole.Window, self.qcolor(colors.CANVAS)