This is a v7 3DM file, bt MOI only supports v5
From:
Michael Gibson
8 Jul 2021 (6 of 12)
10388.6
In reply to
10388.4
Mac version here:
https://moi3d.com/download/Convert3DMToRhinoV5_mac.zip
Converts a Rhino v6 or v7 .3dm file into a Rhino v5 .3dm file that MoI can load.
- Michael