 <p>After reading through parse doc, I figured out that AppDelegate.m file should be updated like this for IOS 9:</p> <blockquote> <p>There's also two code changes you'll need to make. First, add the following to your application:didFinishLaunchingWithOptions: method, after you've initialized the Parse SDK.</p> <pre><code>// AppDelegate.m #import &lt;FBSDKCoreKit/FBSDKCoreKit.h&gt; #import &lt;ParseFacebookUtilsV4/PFFacebookUtils.h&gt; @implementation AppDelegate - (void)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [Parse setApplicationId:@"parseAppId" clientKey:@"parseClientKey"]; [PFFacebookUtils initializeFacebookWithApplicationLaunchOptions:launchOptions]; } Next, add the following handlers in your app delegate. - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation { return [[FBSDKApplicationDelegate sharedInstance] application:application openURL:url sourceApplication:sourceApplication annotation:annotation]; } - (void)applicationDidBecomeActive:(UIApplication *)application { [FBSDKAppEvents activateApp]; } </code></pre> <p>There are two main ways to use Facebook with your Parse users: (1) to log in (or sign up) as a Facebook user and creating a PFUser, or (2) linking Facebook to an existing PFUser.</p> </blockquote>