Google Nik Collection is now free. Yep you can even get a refund if you purchased the collection in 2016. I am very happy to see these 7 photo editing plugins available for download at no cost. You can get your copy at this website https://www.google.com/nikcollection/
The collection consist of 7 softwares that can be use as plugins with Adobe Photoshop, Lightroom, Elements, and Aperture. Unfortunately the Mac Photos users will need to work a little harder to use these plugins with the default Mac OS photo editing software. This video will show you how to make it work.
All and all I am sure that every Mac Photos user will be delighted to see how much more post production and editing power they can get from this great free Google Nik Collection.