I am successfully using Cura v4.8.0 on an Apple MacBook with the new M1 chipset. It functions, but is rather buggy in some places.
• Previews usually don't work. Nothing shows up in the preview window. (Likely an OpenGL issue?)
• I have to restart to load in a new model, or to do almost anything following performing a slice.
That is about all I have noticed so far. Apple brags about the ease of updating applications to run natively with M1. Hope that Ultimaker can address this issue with a quick cure-a.