Structure of Replacement Skies Lost in PS23

Hi @Angus Hamilton, welcome to the Adobe Support Community! If I understand your question correctly, if you exported your .sky file presets as you named and structured them, they should be in this directory on macOS: Users > [Your name] > Library > Preferences > Adobe Photoshop 2023 settings > Sky presets. To access the library, you must check the box “Display the library folder” in the presentation options. In the future, here are the steps you need to take:

From the computer with the correct skies structure: Export Selected Skies (use the Shift key to select more than one). When asked for a save prompt, you need to name the .sky file to match the folder or individual skies you are exporting. If you hold the shift key down to select more than one folder of skies, your named structure for each sky and folder will be retained.

On the same computer, navigate to this directory where you exported your presets. Copy your exported .sky presets to a cloud, network, or external drive to access and import them to the second computer.

On the second computer, go to Get More Skies > Import Presets. Navigate to your copy of saved preset files. When you are sure you have the right structure and all your skies loaded, you can delete any duplicated presets that you had there before. I hope that's helpful!