Howdy,
macOS Education Payload is still in development, not released yet. One of the complexities here is fixing support for the "user channel" on macOS — it's not as simple as just creating a new payload.
For the purposes of transparency, we are still probably a couple months away from completing this. That said, there have been the many requests for this feature in this community and in Wishes™ so we are looking forward to getting it completed.
Noah Salzman
Product Manager for Meraki SM