macOS: Silence warning about supporting secure state restoration

We don't support or implement state restorations via the AppKit
state restoration APIs, but if we did, we would/should support
secure state restoration. This is the default for apps linked
against the macOS 14 SDK, but as we target versions below that
as well we need to return YES here explicitly to silence a runtime
warning.

Pick-to: 6.6 6.5 6.2
Fixes: QTBUG-117745
Change-Id: I0145504a79e53499852832d23dc7d4d6838dfa1b
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm b/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm
index bb7b5c3c0c..42c76e38e8 100644
--- a/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm
+++ b/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm
@@ -329,6 +329,23 @@ QT_USE_NAMESPACE
     else
         QWindowSystemInterface::handleFileOpenEvent(qurlString);
 }
+
+- (BOOL)applicationSupportsSecureRestorableState:(NSApplication *)application
+{
+    if (@available(macOS 12, *)) {
+        if ([reflectionDelegate respondsToSelector:_cmd])
+            return [reflectionDelegate applicationSupportsSecureRestorableState:application];
+    }
+
+    // We don't support or implement state restorations via the AppKit
+    // state restoration APIs, but if we did, we would/should support
+    // secure state restoration. This is the default for apps linked
+    // against the macOS 14 SDK, but as we target versions below that
+    // as well we need to return YES here explicitly to silence a runtime
+    // warning.
+    return YES;
+}
+
 @end
 
 @implementation QCocoaApplicationDelegate (Menus)