`show` doesn't work in python 3.13 but works in 3.12

[dvd101x]

To Reproduce

Making a new venv on 3.13.9 installing cadquery (pip) and running the example for show

from cadquery import *
from cadquery.vis import show

w = Workplane().sphere(1).split(keepBottom=True) - Workplane().sphere(0.5)
r = w.faces('>Z').fillet(0.1)

# Show the result
show(r, alpha=0.5)

Throws an error, but the same procedure of creating a venv in 3.12.10, installing cadquery and running the show example works as expected.

I found it while trying to make a mixture of cadquery and sdf (like microgen), I don't specifically need 3.13, just filling the report in case it helps.

Backtrace

^CVTK not installed
Traceback (most recent call last):
  File "/Users/david/Documents/code/cq2/test.py", line 1, in <module>
    from cadquery import *
  File "/Users/david/Documents/code/cq2/lib/python3.13/site-packages/cadquery/__init__.py", line 11, in <module>
    from .occ_impl.shapes import (
    ...<9 lines>...
    )
  File "/Users/david/Documents/code/cq2/lib/python3.13/site-packages/cadquery/occ_impl/shapes.py", line 292, in <module>
    from OCP.IVtkOCC import IVtkOCC_Shape, IVtkOCC_ShapeMesher
ImportError: cannot import name 'IVtkOCC_Shape' from 'OCP.IVtkOCC' (/Users/david/Documents/code/cq2/lib/python3.13/site-packages/OCP/IVtkOCC/__init__.py)

Environment

OS:
MaxOS 26.1
Sorry, I wasn't using conda, I was using pip.

Was CadQuery installed using Conda?:
Output of conda list from your active Conda environment:

Using:
Python interpreter

[jmwright]

Is this an Intel-based Mac, or an M1, etc?

[dvd101x]

Thanks.

It's not an intel, it's an M series.

[adam-urbanczyk]

What is in your working and not working env? Does it work as expected with conda packaged version?

[dvd101x]

In both there is noting but cadquery. Just pip install cadquery. I found out by work in another venv with vtk, cadquery, numpy and jax. But replicated a minimal example by making two new venvs with just cadquery.

I don't have conda. But I can try and report back.