From 1594e5f4e35a66d664049006e99d2d9cc446e932 Mon Sep 17 00:00:00 2001
From: Jonathan White <support@dmapps.us>
Date: Sun, 9 Jul 2023 15:04:14 -0400
Subject: [PATCH] MacOS: Fix crash on exit

* Fixes #9423
---
 src/gui/osutils/macutils/AppKitImpl.mm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gui/osutils/macutils/AppKitImpl.mm b/src/gui/osutils/macutils/AppKitImpl.mm
index c700c06d5..fbf4a9d0e 100644
--- a/src/gui/osutils/macutils/AppKitImpl.mm
+++ b/src/gui/osutils/macutils/AppKitImpl.mm
@@ -243,6 +243,7 @@ AppKit::~AppKit()
 {
     [[[NSWorkspace sharedWorkspace] notificationCenter] removeObserver:static_cast<id>(self)];
     [[NSDistributedNotificationCenter defaultCenter] removeObserver:static_cast<id>(self)];
+    [NSApp removeObserver:static_cast<id>(self) forKeyPath:@"effectiveAppearance"];
     [static_cast<id>(self) dealloc];
 }