🚨 This is a Swift 2 repo. The updated version: https://github.com/klaas/CollectionViewSwift4 🚨
Apple changed the way NSCollectionView works in OS 10.11 as shown in the talk "What's New in NSCollectionView" at WWDC 2015. They also provide a complex example written in Objective-C: CocoaSlideCollection
This is a simple sample project written in Swift.
It uses the standard Cocoa Application template and has a single view controller containing a collection view. It shows simple labels as items. You can select and double click items.
There is still a bug in Xcode (as of 7.3 (7D175)): When you add a NSCollectionView within Interface Bulider you'll get a compile error saying:
Main.storyboard: error: Unknown segue relationship: Prototype
The workaround used in this project is to remove the segue and create a .xib file containing the collection view item. The filename can then be used as an item identifier.
The branch ProgrammaticVersion contains a second NSCollectionView that does not rely on any Interface Builder files.