Firstly, we apologise for the delay. Normally, we strive to provide support for new SketchUp versions a few weeks ahead of the application release but didn’t make it this time around.
A driver update will be available in the next two weeks or so. In the meantime, we suggest to get in touch with 3Dconnexion customer service (contacts at http://www.3dconnexion.com) if you wish to use a test build of the software.
Please note that we cannot recommend the use of unverified software in a production environment where data loss cannot be tolerated.
With that said, the changes that we had to implement to software SU 2021 Pro are important (new Ruby implementation) but minor. I do not expect any issues using the pre-release extension for SketchUp.
For macOS 11, we have a new driver beta with support for SU2021. This is pending confirmation, though. The update will be included in “beta 6”.
Edit (Nov 26, 2020). Windows extension with SketchUp 2021 support available from here. The web page will remain accessible until version 10.7.1 of 3DxWare 10 is published on the 3Dconnexion web site (expected in the first half of December).
Edit (Nov 24, 2020). Beta 7 (revision r3274) for macOS was posted today with SketchUp 2021 support. Software can be downloaded from here.