Ultimaker Cura uses OpenGL libraries. With a recent update of the Big Sur OS, and on the new macbooks containing the M1 processing chips there are Apple has introduced incompatibilities between the OpenGL libraries used, and the latest firmware used by the Macbook.
You can read more about the Apple M1 chip on their website.
This means that Ultimaker Cura is currently not supported on new Macbooks containing the M1 chip. Please bear with us while we look into fixing this in an upcoming Ultimaker Cura version.