RadianceKit is the first native macOS app for 3D Gaussian Splatting. Drop in photos or video of any object or scene — it aligns the cameras, trains the model, and renders a photorealistic 3D reconstruction, all locally on your Mac's GPU. No Python, no CUDA, no cloud. Simple Mode for one-click results, Scene-Class Presets (Render/Outdoor/Indoor), and full Expert control. Export to 6 formats, orbit videos, and web viewers. M1+, $7.99 one-time, 3-day trial.