The problem was from apple side. They believe that the problem is now solved. Thank Apple team. My problem gets resolved. I don't see these type of errors now.

At last my problem got resolved. I have figured out that my app identifier has 2 iCloud containers attached with. I removed the iCloud container which was not in use. Steps to edit iCloud container. Go to your developer account Certificates, IDs & Profiles Identifiers Select your app's identifier iCloud > Edit Container Choose the correct iCloud container This did solve my problem. Hope it works for you too.

I had the similar issue. I have figured out that my app identifier has 2 iCloud containers attached with. I removed the iCloud container which was not in use. Steps to edit iCloud container. Go to your developer account Certificates, IDs & Profiles Identifiers Select your app's identifier iCloud > Edit Container Choose the correct iCloud container This did solve my problem. Hope it works for you too.

I have the same problem. Couldn't solve by any solution. Did you solve the issue?

Tried this - allowed multiple selection=> On tapping already selected cell doesn't deselect it.

OK, I figured out why it's not wokring.I'm not using MainMenu.xib, instead I'm using Main.storyboardWhat I want is Show first Splash Window and then Main WindowPlse find demo source at htt ps://github.com/bchandresh/NSWindowDemoAlso note my email address bchandresh@icloud.com

Sorry Cluade,Forgot to add error desciption.I receive following error:Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional valueon line splashWindow.makeKeyAndOrderFront(splashWindow)

Well, it's throwing an error in applicationDidFinishLaunching, on line splashWindow.makeKeyAndOrderFront(splashWindow)

Yes

Animation didn't work.Tried removing:CATransaction.begin()andCATransaction.commit()still didn't work

I tried both the ways, but it didn't workoption 1:func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> NSSize { if let selectedRow = selectedRow { if selectedRow == indexPath.item { CATransaction.begin() let animation = CABasicAnimation(keyPath: "transform.scale.y") animation.duration = 3.0 animation.fromValue = 71 animation.toValue = 571 collectionView.item(at: indexPath)?.view.layer?.add(animation, forKey: "transform.scale.y") CATransaction.commit() return NSSize(width: collectionView.bounds.width, height: 571) } } return NSSize(width: collectionView.bounds.width, height: 71) }option 2:func collectionView(_ collectionView: NSCollectionView, didSelectItemsAt indexPaths: Set<IndexPath>) { if let indexPath = indexPaths.first { if self.selectedRow == indexPath.item { self.selectedRow = nil } else { self.selectedRow = indexPath.item } if let cell = collectionView.item(at: selectedRow!) { CATransaction.begin() let animation = CABasicAnimation(keyPath: "transform.scale.y") animation.duration = 2.0 animation.fromValue = 71 animation.toValue = 571 cell.view.layer?.add(animation, forKey: "transform.scale.y") CATransaction.commit() } } }

Hi Cluade,I'm looking for NSCollectionView & not for UICollectionView