From dea6de9002313a1a68d40fcad0d144d85f572ecc Mon Sep 17 00:00:00 2001
From: Thomas A Caswell <tcaswell@gmail.com>
Date: Wed, 3 Apr 2024 15:11:18 -0400
Subject: [PATCH] Backport PR #27955: Add a draw during show for macos backend

---
 lib/matplotlib/backends/backend_macosx.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/matplotlib/backends/backend_macosx.py b/lib/matplotlib/backends/backend_macosx.py
index 726a2ada8425..66bc9bfc99d3 100644
--- a/lib/matplotlib/backends/backend_macosx.py
+++ b/lib/matplotlib/backends/backend_macosx.py
@@ -179,6 +179,8 @@ def start_main_loop(cls):
             _macosx.show()
 
     def show(self):
+        if self.canvas.figure.stale:
+            self.canvas.draw_idle()
         if not self._shown:
             self._show()
             self._shown = True