From cd8741f638ab6e0567ceaa63b2a5d0d61880365d Mon Sep 17 00:00:00 2001
From: Vlad Borovtsov <borovcov.vlad@gmail.com>
Date: Sun, 30 Nov 2025 23:33:08 +0100
Subject: [PATCH] Fix rendering without hosting view on macOS

---
 framework/Source/CPTLayer.m | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/framework/Source/CPTLayer.m b/framework/Source/CPTLayer.m
index aa6cd5bcb..18324d89b 100644
--- a/framework/Source/CPTLayer.m
+++ b/framework/Source/CPTLayer.m
@@ -330,23 +330,29 @@ -(void)display
 
         if ( [NSView instancesRespondToSelector:@selector(effectiveAppearance)] ) {
             CPTGraphHostingView *hostingView = [self findHostingView];
-            if ( [NSAppearance instancesRespondToSelector:@selector(performAsCurrentDrawingAppearance:)] ) {
+            NSAppearance *appearance = hostingView.effectiveAppearance;
+
+            if ( appearance && [NSAppearance instancesRespondToSelector:@selector(performAsCurrentDrawingAppearance:)] ) {
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunguarded-availability-new"
-                [hostingView.effectiveAppearance performAsCurrentDrawingAppearance: ^{
+                [appearance performAsCurrentDrawingAppearance: ^{
                     [super display];
                 }];
 #pragma clang diagnostic pop
             }
-            else {
+            else if ( appearance ) {
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
                 NSAppearance *oldAppearance = NSAppearance.currentAppearance;
-                NSAppearance.currentAppearance = hostingView.effectiveAppearance;
+                NSAppearance.currentAppearance = appearance;
                 [super display];
                 NSAppearance.currentAppearance = oldAppearance;
 #pragma clang diagnostic pop
             }
+            else {
+                // No hosting view; fall back to the default rendering path so the layer still draws.
+                [super display];
+            }
         }
         else {
             [super display];