Catia is not available for Mac but there are plenty of alternatives that runs on macOS with similar functionality. The best Mac alternative is FreeCAD, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Catia and 13 are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Catia are LibreCAD (Free, Open Source), Autodesk AutoCAD (Paid), MakerSCAD (Freemium, Open Source) and NX (Paid).
OpenVSP (Vehicle Sketch Pad) is a geometry modeling tool for conceptual aircraft design. The software rapidly models aircraft configurations without expending the expertise required for traditional Computer Aided Design (CAD) packages.
Electra® Cloud offers impressive benefits that more than save time or eliminate tedious work, it leaves then engineer free to focus on the important parts of a design, the control scheme, operations and safety of the entire machine.