Do you mean that export to video (h264, animated gif, etc.) works well on Windows but not on macOS?
Have you installed ffmpeg and specified its location as described in the documentation?
I’ve noticed that you posted this question twice (the other location was here), and it was answered both places, by different people, overall approximately doubling the time that we had to spend with this question. To make sure that everyone’s time is used well, please post only in one place.