I\'ve updated to Xcode 7 and the latest iOS SDK. I\'ve added the appropriate entries in my app\'s plist:
My app\'s Facebook login works fine on device. Howe
This is not a problem. The FB SDK is trying to open the native facebook app which has the fbauth2:// url type. In Simulator its not available, so its just putting a log that it could not open the native Facebook app. You can configure the Facebook acct in Simulator and then tell the FB Login button to use the native Facebook account instead of opening the web view. But Facebook contends that millions of people use Facebook in browser and so in iOS 9 they have used the new SFSafariViewController as the default behaviour for facebook logins even on devices. You can try to use the native Facebook and see if it works.
Check this link for the discussion.
https://www.facebook.com/login.php?next=https%3A%2F%2Fdevelopers.facebook.com%2Fbugs%2F786729821439894%2F%3Fsearch_id