diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 449c5a2c6..a48c7a754 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -4770,6 +4770,7 @@ static CGImageRef capture_decorated_window_SCK(NSWindow *nswin) {
       int s = (int)[filter pointPixelScale];
       SCStreamConfiguration *config = [[[SCStreamConfiguration alloc] init] autorelease];
       [config setIgnoreShadowsSingleWindow:YES];
+      [config setIgnoreShadowsDisplay:YES]; // necessary with macOS 26 Tahoe
       [config setShowsCursor:NO];
       [config setWidth:W*s];
       [config setHeight:H*s];