I recently had a problem with Luminar 4 which wouldn't open on my MacBook Pro. No matter what I tried, it wouldn't work. The Skylum Software support responded to my emails almost by return, tried to help resolve the issue, and when it was clear it wasn't going to be resolved, they offered me an alternative replacement: Luminar A1, or Luminar Neo. I was given trial periods for both programmes, and eventually opted for the Neo. I was very happy with how my problem was dealt with by Skylum and the speed of their responses. The Luminar programmes are good with their rather gimmicky alterations and enhancements, but lack the sophistication of Photoshop. For example, you can't do simple things like write text onto a photo - something that even elementary an programme like Preview can do. I hope they will add such things in the future.