Although we try to have Maxon desktop products in their main release adjusted to new Operating Systems (OS) as soon as possible, there was no major update as yet to R25 since Windows 11 and macOS 12 were released.
Basic tests show it runs on both but also some issues surfaced here and there, and we don't have wide feedback from several systems on these OS versions yet. Also, early main releases on Operating systems usually show some issues in combination with drivers and apps. It is generally a good idea to wait for a first service pack on both, the OS and your desktop app if you have the option. Especially if you are in the middle of a production.
Once we release an update to Cinema 4D R25 where we are confident you will have an overall good user experience with these new Operating Systems we will update this article.