Confirm Dream Skin is installed
If Dream Skin is missing, complete the macOS installation guide first. Installing the tool and adding a theme are separate procedures.
Unzip the downloaded theme
In Downloads, double-click codex-skin-lab-<theme-name>.zip. Keep theme.json and the background image together in the extracted folder.
Open the theme library
Open Terminal and run the command below. Finder opens the themes folder created by Dream Skin.
open "$HOME/Library/Application Support/CodexDreamSkinStudio/themes"Move the complete theme folder
Drag the extracted codex-skin-lab-<theme-name> folder into themes. The final path should end in themes/codex-skin-lab-<theme-name>/theme.json.
Switch and verify
Replace <theme-id> with the folder name, such as codex-skin-lab-sweet-moon. After switching, check Home, an ordinary task, and the composer.
~/.codex/codex-dream-skin-studio/scripts/switch-theme-macos.sh --id <theme-id>