CAD QuickLook

App 06 / 0110 · Finder utility

Now Available

Preview 3D CAD files right in Finder.

CAD QuickLook adds QuickLook previews and Finder thumbnails for 3D CAD and mesh files. Press Space on a supported file to open an interactive 3D view — rotate, zoom, and pan — without launching a heavy CAD application. Thumbnails appear automatically in Finder's icon and gallery views.

Interactive 3D preview on Space — rotate, zoom, and pan
Finder thumbnails in icon and gallery views
Eight formats: 3MF, STEP, IGES, AMF, glTF / GLB, FBX, 3DM, and DXF
Native STEP and IGES tessellation via OpenCASCADE; Rhino 3DM via openNURBS
Sandboxed Finder extension — no network requests, no analytics, no tracking

Platforms macOS

Minimum macOS 15 · Apple silicon

A CAD QuickLook preview of a STEP CAD model rotating as an interactive 3D render inside a macOS window

Supported formats

3MF — 3D Manufacturing Format, including embedded thumbnails and materials
STEP / STP — ISO 10303 CAD exchange (B-Rep tessellated for preview)
IGES / IGS — legacy CAD exchange
AMF — Additive Manufacturing File format
glTF / GLB — Khronos transmission format
FBX — Autodesk exchange
3DM — Rhinoceros 3D (NURBS tessellated for preview)
DXF — AutoCAD exchange (3D entities)

Open source & licensing

CAD QuickLook is built on open-source libraries, including Open CASCADE Technology (OCCT) for STEP and IGES, and openNURBS for Rhino 3DM. OCCT is licensed under the GNU LGPL v2.1; the app links it dynamically, and you are free to rebuild it and run a modified copy. Open-source notices, source, and rebuild instructions →

Privacy

CAD QuickLook makes no network requests and collects no analytics, identifiers, or telemetry. It reads only the file you preview. Read the full privacy policy →