Hi Chipp, you might try DXF, STEP, or IGES formats and see if Keyshot will import curves from any of those.

I took a quick look over the Alembic documentation and it does look like it only supports a limited kind of curve, which looks like a cubic curve without any knot values or weights so a subset of NURBS.

You might try exporting to DXF format out from MoI and choose the option for export curves as cubic splines to generate that type of curve output.

Maybe ask Keyshot tech support if they can read curves from any format other than Alembic.

- Michael