OpenSCAD limit :(

I have hit a sanity limit on OpenSCAD. Does any one know of a free (perhaps as in beer) solidworks Mac alternative? I am still yet to get freeCAD working without crashing on me. The thing I want to work on is a ROV hull - https://skippy.org.uk/openscad-openrov-design/

Any thoughts?

Philip McGaw
www.philipmcgaw.com
07969502077

@Philip_McGaw