Added OS version guard for NSApp activate call

Author: beldenfox

modules/javafx.graphics/src/main/native-glass/mac/GlassApplication.m

@@ -295,13 +295,15 @@ - (void)applicationDidFinishLaunching:(NSNotification *)aNotification
     [pool drain];
     GLASS_CHECK_EXCEPTION(env);
 
-     if (!NSApp.isActive && requiresActivation) {
-        // As of macOS 14, application gets to the foreground,
-        // but it doesn't get activated, so this is needed:
-        LOG("-> need to active application");
-        dispatch_async(dispatch_get_main_queue(), ^{
-            [NSApp activate];
-        });
+    if (@available(macOS 14.0, *)) {
+        if (!NSApp.isActive && requiresActivation) {
+            // As of macOS 14, application gets to the foreground,
+            // but it doesn't get activated, so this is needed:
+            LOG("-> need to active application");
+            dispatch_async(dispatch_get_main_queue(), ^{
+                [NSApp activate];
+            });
+        }
     }
 }