Old photo, new software. Percé Rock (or Rocher Percé in French) is located at the tip of the Gaspé Peninsula in Quebec, Canada. I drove there from Montreal back in 2003 armed with my first digital camera, a Sony Cybershot DSC-S85.
I noticed a white halo in an earlier edit. When re-processing the JPEG in Luminar 3, I experienced the same issue when using the AI Sky Enhancer filter to boost contrast in the sky. Turns out, this is not a difficult problem to fix, and I was able to reproduce the fix in both Photoshop and Luminar 3.
In Photoshop, I created a new layer and used the Clone Stamp tool with Sample set to Current & Below. Next, I sampled the sky next to the edge with the white halo, and cloned out the white halo. Next, in the Layer tab, I set the blend mode to Darker Color. Since I’m cloning out the halo from the adjacent sky, there will be no impact on the sky. Since the sky is darker than the white halo, the white halo is cloned out. Finally, since the sky is lighter than the rock, it has no effect on the rock. Thus, I was able to clone out just the white halo with an adjacent color.