I've got Luminar 3 on a 27in Retina iMac and it performs adequately. Some of its "AI" filters are quite impressive. The Sky filter, for example, really finds th

I've got Luminar 3 on a 27in Retina iMac and it performs adequately. Some of its "AI" filters are quite impressive. The Sky filter, for example, really finds the sky, and only the sky, in a picture and changes it. To get the same result in PhotoShop I'd have to spend half an hour making a carefully masked Curves layer. OTOH, the absence of IPTC metadata editing means I can't use it to manage my image library, because I rely heavily on IPTC keywords. Also, Luminar has a very strong "hands-off" attitude toward the file system and the original image files. So all the fancy improvements you make are held in the app's catalog. If you want an actual file containing your improved image you have to "Export" it. You can't use Luminar, as you could use Adobe Bridge, to move or copy image files from folder to folder.